• School
  • Engineering and Architecture
  • Management and Business Administration
  • Medicine and Allied Sciences
  • Law
  • Animation and Design
  • Media, Mass Communication and Journalism
  • Finance & Accounts
  • Computer Application and IT
  • Pharmacy
  • Hospitality and Tourism
  • Competition
  • Study Abroad
  • Arts, Commerce & Sciences
  • Learn
  • Online Courses and Certifications
NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects

Edited By Vishal kumar | Updated on Feb 16, 2024 06:21 PM IST

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects: Solutions for science chapter 14 class 7 are part of NCERT Solutions for Class 7 Science. If you are a Class 7 student who is following the NCERT book, then a tool like NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects is helpful in the preparation of the chapter. Electric current and effect deal with the concepts of representation of electrical components such as bulbs, switches, batteries etc. using symbols, the heating effect and the magnetic of current and also electromagnet and its applications.

This Story also Contains
  1. Electric Current and Its Effects Class 7 NCERT Solutions: Important Formulas and Points
  2. Electric Current and its Effects Class 7 Science Chapter 14-Topics
  3. Benefits of NCERT solutions for Class 7 Science Chapter 14 Electric Current and Its Effects:
  4. If you have the detailed NCERT solutions for Class 7 Science Chapter 14 Electric Current and Its Effects in your hands, you can use them to prepare for exams
  5. Key Features of Class 7 Science Chapter 14 Question Answer

The NCERT solutions for Class 7 Science chapter 14 Electric Current and Its Effects help students to be familiar with the concepts studied in the chapter. NCERT Solutions for Class 7 Science chapter 14 Electric Current and Its Effects will give you answers to all the thirteen questions which are mentioned in the exercise. The NCERT solutions are an important tool for a student who is following the NCERT syllabus. Students are recommended to go through NCERT Solutions for Class 7 to score high marks in their examinations.

**As per the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 10 in Class 7 Science.

Free download class 7 electric current and its effects ncert solutions PDF for CBSE exam.

Download the PDF of NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects

Download PDF

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects: Exercise Question and Answer

1. Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, cell, switch in the ‘ON’ position, and battery

Answer:

Symbols for various components of electrical circuits are-

Electric Components Symbols
Connecting Wires 15961152793051596115277254
Switch OFF position 15961152868991596115285657
Bulb 15961153078681596115306657
Cell 15961153159681596115314401
Switch ON position 15961153227291596115321170
Battery 15961153301911596115329069

2. Draw the circuit diagram to represent the circuit shown in Fig.14.21.

15961156117851596115609643

Answer:

In the above figure, one end of the cell is connected to bulb and the other is connected to switch. The switch is in OFF position. One end of the bulb is connected to switch and the other is with the cell.
The circuit diagram of the above-given figure is-

1596115619804

3. Fig.14.22 shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells.

1596115632439


Answer:

To make a battery from the four cell we need to connect the one positive end of a cell to the negative end of the other cell. In this way, we can form a four-cell battery.

1596116187027



4. The bulb in the circuit shown in Fig.14.23 does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.

15961161805911596116178200

Answer:

The problem in the above circuit diagram is that cells are not connected properly, both the positive terminal of a cell is connected. To glow bulb, the positive end of the cell must be connected with the negative end of the other cell. As shown in the figure:-
15961161695381596116168198

5. Name any two effects of electric current.

Answer:

The two effects of electric current are-
(i) Heating effect- When current is passing through the wires, the wires become hot and produces heat.

(ii) Magnetic Effect - When current is passing through the wires, it behaves like a magnet.

6. When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.

Answer:

When the current is passing through the wires, it behaves like a magnet and rises to a magnetic field around it which exerts a magnetic force on the compass needle and reflects it from North-South position.

7. Will the compass needle show deflection when the switch in the circuit shown by Fig.14.24 is closed?

1596116157957

Answer:

No, Because in the above circuit diagram there is no source of current supply like battery or cell. In the absence of current wire will not act as a magnet, and hence needle will not show any deflection.

8. Fill in the blanks:

(a) Longer line in the symbol for a cell represents its_____________ terminal.
(b) The combination of two or more cells is called a_________ .
(c) When current is switched ‘on’ in a room heater, it ____________ .
(d) The safety device based on the heating effect of electric current is called a_____________ .

Answer:

(a) Positive
(b) Battery
(c) Produces heat (due to the heating effect of current)
(d) Fuse (When a large amount of current is flowing through the wire, it melts and break the circuit)

9. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(a) To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. (T/F)
(b) When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. (T/F)
(c) An electromagnet does not attract a piece of iron. (T/F)
(d) An electric bell has an electromagnet. (T/F)

Answer:

(a) False, Negative terminal should be connected to the positive terminal of the other cell

(b) True, The wire of fuse is of low melting point. So, when the heat due to current is higher than a certain limit, it melts quickly and breaks the circuit

(c) False, A magnet always attracts the iron piece.

(d) True,

10. Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.

Answer:

No, because the plastic bag is non-magnetic in nature and hence it is not attracted by the electromagnets from the garbage heap.

11. An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response.

Answer:

No, I m not agree with the electrician because the fuse wire should have a low melting point. So, that it can quickly melt and break the circuit.

The ordinary wire has a high melting point as compare to fuse wire. Thus it cannot be used in fuse wires.

12. Zubeda made an electric circuit using a cell holder shown in Fig. 14.4, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.

Answer:

The following defects may be presents in the circuits-

  • The rubber band used in the cell holder may not be tight enough to keep the cells in proper contact.
  • The two cells may not be properly connected. We must connect the negative terminal to the positive end of the other cell.
  • The bulb may be fused.
  • Circuit connection may be loose. etc

13. In the circuit shown in Fig. 14.25

15961161416501596116139420

(i) Would any of the bulb glow when the switch is in the ‘OFF’ position?
(ii) What will be the order in which the bulbs A, B and C will glow when the switch is moved to the ‘ON’ position?

Answer:

(i) No, because the circuit connection does not compete for any bulb so, that flow of current is not possible.

(ii) Bulbs will glow simultaneously

All the bulbs will glow at once.

class 7 science chapter 14 question answer section consists of a total of thirteen questions. The experts at Careers360 have created solutions for the chapter in easy language and a step-by-step approach, adhering to the latest CBSE syllabus (2023-2024). Additionally, students can access the PDF version of the solution and use it anytime for reference.

Chapter-wise NCERT solutions of class 7 science

Apart from class 7 science ch 14 question answer, students can access complete chapterwise solutions for class 7 science by clicking on the given chapterwise link.

Chapter 1Nutrition in Plants
Chapter 2Nutrition in Animals
Chapter 3Fibre to Fabric
Chapter 4Heat
Chapter 5Acids, Bases and Salts
Chapter 6Physical and Chemical Changes
Chapter 7Weather, Climate and Adaptations of Animals to Climate
Chapter 8Winds, storms and cyclones
Chapter 9Soil
Chapter 10Respiration in Organisms
Chapter 11Transportation in Animals and Plants
Chapter 12Reproduction in Plants
Chapter 13Motion and Time
Chapter 14Electric Current and its Effects
Chapter 15Light
Chapter 16Water: A Precious Resource
Chapter 17Forests: Our Lifeline
Chapter 18Wastewater Story

Electric Current and Its Effects Class 7 NCERT Solutions: Important Formulas and Points

Basic of charge

  • Electric charge is a fundamental property of matter that leads to the interaction of objects when placed in an electromagnetic field.

  • There are two types of electric charges: positive and negative. Objects with the same type of charge (either both positive or both negative) repel each other, while objects with different types of charge (one positive and one negative) attract each other.

  • The standard unit of electric charge is the Coulomb (C). One Coulomb is equivalent to approximately 6.242×1018 elementary charges (e).

  • The charge of an electron, a fundamental subatomic particle, is approximately -1.602×10-19 Coulombs (C). This charge is considered negative.

Heating Effects of Electric Current

  • The heating effect of electric current refers to the generation of heat in a wire when electricity passes through it.

  • The amount of heat produced depends on factors like the material, thickness, and length of the conductor. Overheating can lead to wire damage or melting, and this effect is used in appliances like heaters, toasters, and safety devices such as fuses.

Electric Bulb and Electric Fuse

Electric Bulbs: Electric bulbs produce light when the filament inside them becomes extremely hot due to the passage of electric current, a phenomenon known as incandescence.

Electric Fuse: An electrical fuse consists of a wire that melts when subjected to excessive current, serving as a safety device to break the circuit and prevent overloading. Fuses are essential for preventing fires and protecting electrical circuits and appliances.

Electric bell

  • An electric bell primarily consists of an electromagnet.

  • To activate the bell, a switch is pressed, completing the electrical circuit.

  • Completing the circuit allows electric current to flow through the coil of the electromagnet.

  • The energized electromagnet attracts a movable armature.

  • As the armature is attracted, it strikes a bell or a gong, producing a ringing sound.

  • Releasing the switch interrupts the circuit, de-energizing the electromagnet and allowing the armature to return to its original position.

Electric Current and its Effects Class 7 Science Chapter 14-Topics

Topics for electric current and its effects class 7 questions and answers are listed below:

  • Symbols of Electric Components
  • Heating Effect of Electric Current
  • Magnetic Effect of Electric Current
  • Electromagnet
  • Electric Bell

Benefits of NCERT solutions for Class 7 Science Chapter 14 Electric Current and Its Effects:

  • If you have the detailed NCERT solutions for Class 7 Science Chapter 14 Electric Current and Its Effects in your hands, you can use them to prepare for exams

  • NCERT Solutions for Class 7 Science chapter 14 Electric Current and Its Effects helps in understanding the concepts well.
  • You may expect exactly the same questions discussed in the NCERT solutions for Class 7 Science Chapter 14 Electric Current and Its effects for the annual exam.

Key Features of Class 7 Science Chapter 14 Question Answer

Conceptual Understanding: The chapter's electric current and its effects class 7 solutions are designed to assess students' understanding of fundamental concepts related to electric current, conductors, insulators, circuits, and the heating effect of electric current.

Problem-Solving: Many questions in this electric current and its effects class 7 ncert solutions require students to apply the principles of electric circuits and conductors to solve problems related to current, resistance, and voltage.

Critical Thinking: Some questions of class 7 science chapter 14 question answer encourage critical thinking by asking students to explain phenomena related to electric current and its effects.

Real-World Applications: class 7 science chapter 14 ncert solutions often relate to practical applications of electricity and how it is used in everyday devices like bulbs, fuses, and heaters.

Safety Considerations: Students may be asked about safety measures related to electrical circuits and devices to ensure they understand the potential hazards and how to prevent them.

Free Access: Electric current and its effects class 7 questions and answers are available for free of charge.

NCERT Solutions for Class 7 Subject Wise

NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 7 Science

Also Check NCERT Books and NCERT Syllabus here

Frequently Asked Questions (FAQs)

1. Whether the Class 7 Science chapter 14 electric current and its effects is useful in higher studies ?

Yes, this chapter is very important for higher studies in the field of science and electrical engineering. Electricity is studied in Class 10 and 12 NCERT syllabus.

Also Read

Articles

Upcoming School Exams

Manipur Board 12th Examination

Admit Card Date:30 December,2024 - 26 March,2025

Bihar Board 10th Examination

Admit Card Date:08 January,2025 - 25 February,2025

Maharashtra Higher Secondary School Certificate Examination

Admit Card Date:10 January,2025 - 12 March,2025

Maharashtra School Leaving Certificate Examination

Admit Card Date:20 January,2025 - 17 March,2025

Jharkhand Academic Council 10th Examination

Admit Card Date:25 January,2025 - 03 March,2025

View All School Exams
Get answers from students and experts

Popular Questions

A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

 Option 2)

0.16\; J
Option 3)

1.00\; J

 Option 4)

0.67\; J
Read More

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

 Option 2)

 6.45×10−3 kg
Option 3)

 9.89×10−3 kg

 Option 4)

12.89×10−3 kg

 
Read More

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

 Option 2)

200 \, \, J - 500 \, \, J
Option 3)

2\times 10^{5}J-3\times 10^{5}J

 Option 4)

20,000 \, \, J - 50,000 \, \, J
Read More

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

 Option 2)

\; K\;
Option 3)

zero\;

 Option 4)

K/4
Read More

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

 Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced
Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

 Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .
Read More

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

 Option 2)

3.125 × 10-2
Option 3)

1.25 × 10-2

 Option 4)

2.5 × 10-2
Read More

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

 Option 2)

increase two fold
Option 3)

remain unchanged

 Option 4)

be a function of the molecular mass of the substance.
Read More

With increase of temperature, which of these changes?

Option 1)

Molality

 Option 2)

Weight fraction of solute
Option 3)

Fraction of solute present in water

 Option 4)

Mole fraction.
Read More

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

 Option 2)

6.023 × 1022
Option 3)

half that in 8 g He

 Option 4)

558.5 × 6.023 × 1023
Read More

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

 Option 2)

more than 3 but less than 6
Option 3)

more than 6 but less than 9

 Option 4)

more than 9
Read More

Colleges After 12th

Popular Course After 12th

Applications for Admissions are open.

NEET Most scoring concepts
Apply

This ebook serves as a valuable study guide for NEET 2025 exam.

NEET Previous 10 Year Questions
Apply

This e-book offers NEET PYQ and serves as an indispensable NEET study material.

JEE Main Important Physics formulas
Apply

As per latest 2024 syllabus. Physics formulas, equations, & laws of class 11 & 12th chapters

JEE Main Important Chemistry formulas
Apply

As per latest 2024 syllabus. Chemistry formulas, equations, & laws of class 11 & 12th chapters

TOEFL ® Registrations 2024
Apply

Accepted by more than 11,000 universities in over 150 countries worldwide

JEE Main high scoring chapters and topics
Apply

As per latest 2024 syllabus. Study 40% syllabus and score upto 100% marks in JEE

View All Application Forms
News and Notifications
Chennai school teacher suspended for hitting student for not reciting Hindi poem
UP Board Class 10, 12 exams 2025 begin today for 54.37 lakh candidates
Students first: PM Modi delays departure for GIS venue in Bhopal by 15 minutes on Monday
CBSE's proposed global curriculum to be available for other international schools
Class 8 student in Hyderabad jumps from school building after 'slap' by teacher, dies
Tamil Nadu CM launches APPA App to bridge parents-teachers gap
USTM chancellor arrested for alleged 'fraud', promised students high scores; Assam CM claims
Back to top