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7th Punjab Board
IMPORTANT
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An electromagnet does not attract a piece of iron.

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Important Questions on Electric Current and its Effects

EASY
7th Punjab Board
IMPORTANT
Science>Chapter 14 - Electric Current and its Effects>Exercises>Q 9
An electric bell has an electromagnet.
EASY
7th Punjab Board
IMPORTANT
Science>Chapter 14 - Electric Current and its Effects>Exercises>Q 10
Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.
EASY
7th Punjab Board
IMPORTANT
Science>Chapter 14 - Electric Current and its Effects>Exercises>Q 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.
MEDIUM
7th Punjab Board
IMPORTANT
Science>Chapter 14 - Electric Current and its Effects>Exercise>Q 12

Zubeda made an electric circuit using a cell holder shown in the figure, 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.
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EASY
7th Punjab Board
IMPORTANT
Science>Chapter 14 - Electric Current and its Effects>Exercise>Q 13
In the circuit shown in figure,
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Would any of the bulb glow when the switch is in the ‘OFF’ position?

EASY
7th Punjab Board
IMPORTANT
Science>Chapter 14 - Electric Current and its Effects>Exercise>Q 13
In the circuit shown below,
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What will be the order in which the bulbs A, B and C will glow when the switch is moved to the ‘ON’ position?