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Ever wondered how a bulb glow or how a fan works? chapter 10 of class 7 science electric current and its effects explains all these in a fun and easy way You will learn how to draw symbols for electric tools like wires batteries switches and more plus cool concepts like the heating and magnetic effects of current. It even shows how electromagnets work and where we use it in real life.
NCERT Solutions for Class 7 Science Chapter 10 Electric Current and Its Effects help you to understand all the key ideas in a simple way. These solutions have answers to all 13 exercise questions and are perfect for quick revision. If you're following the NCERT syllabus, this is a great tool to prepare well and score better in your exams.
Download the free PDF of Class 7 Science Chapter 10 Electric Current and Its Effects NCERT solutions for CBSE exams. Perfect for easy revision and exam preparation.
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.10.21.
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-
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.
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:-
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.
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.10.24 is closed?
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.
(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.
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.
Answer:
The following defects may be presents in the circuits-
13. In the circuit shown in Fig. 10.25
(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.
Chapter 10 of class 7 science includes thirteen questions all solved by Careers360 subject matter experts in simple language with clear step-by-step explanations, as per the latest CBSE syllabus (2025–2026). Students can also download the solutions in PDF format for easy access and quick revision anytime anywhere.
Chapter-wise NCERT solutions of class 7 science
Apart from class 7 science ch 10 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 | Heat |
Chapter 4 | Acids, Bases and Salts |
Chapter 5 | Physical and Chemical Changes |
Chapter 6 | Respiration in Organisms |
Chapter 7 | Transportation in Animals and Plants |
Chapter 8 | Reproduction in Plants |
Chapter 9 | Motion and Time |
Chapter 10 | Electric Current and its Effects |
Chapter 11 | Light |
Chapter 12 | Water: A Precious Resource |
Chapter 13 | Forests: Our Lifeline |
Chapter 14 | Wastewater Story |
Topics for electric current and its effects class 7 questions and answers are listed below:
With step-by-step NCERT solutions for Class 7 Science Chapter 10, "Electric Current and Its Effects," you can easily understand important concepts and study for advanced exams. Solutions to all the crucial topics are included, and you may even get the same questions in your final exam.
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.
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