Electric Current NCERT Exercise Solution

Question 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.

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Question 2: Draw the circuit diagram to represent the circuit shown in figure. (See textbook for question figure)

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Question 3: The given figure (in textbook) 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.

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Question 4: The bulb in the circuit shown in given figure (textbook) does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.

Answer: The positive terminals of both the cells are together and that is why the bulb is not glowing. The cells should be kept in a way that the positive terminal of one cell is near the negative terminal of another cell; to make the bulb glow.

Question 5: Name any two effects of electric current.

Answer: The two effects of electric current are; heating effect and magnetic effect.

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

Answer: This happens because when electric current passes through a conducting wire, a magnetic field is created around the wire. The magnetic field causes deflection in the magnetic compass.

Question 7: Will the compass needle show deflection when the switch in the circuit shown in this figure is closed?

Answer: Yes