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.

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Electric Current and Its Effects Class 7 NCERT Solutions: Important Formulas and Points
Electric Current and its Effects Class 7 Science Chapter 14-Topics
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
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.

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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
Switch OFF position
Bulb
Cell
Switch ON position
Battery

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

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-

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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.

1596116180591

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:-
1596116169538

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

(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

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

NCERT Solutions for Class 7 Science Chapter 18 Wastewater Story

NCERT Solutions for Class 7 Science Chapter 17 Forests Our Lifeline

NCERT Solutions for Class 7 Science Chapter 16 Water A Precious Resource

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

NCERT Solutions for Class 7 Science Chapter 13 Motion and Time

NCERT Solutions for Class 7 Science Chapter 12 Reproduction in Plants

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