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10th CBSE
IMPORTANT
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Ohm’s law gives a relationship between:

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Important Questions on Electricity

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 26
The unit of electrical resistance is:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 27
The substance having infinitely high electrical resistance is called:
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10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 28
Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 29
Keeping the p.d. constant, the resistance of a circuit is halved. The current will become:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Questions Based on High Order Thinking Skills (HOTS)>Q 30
An electric room heater draws a current of 2.4 A from the 120 V supply line. What current will this room heater draw when connected to a 240 V supply line?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Questions Based on High Order Thinking Skills (HOTS)>Q 31
Name the electrical property of a material whose symbol is “omega”.
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10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Questions Based on High Order Thinking Skills (HOTS)>Q 32

The graph between V and I for a conductor is a straight line passing through the origin.
(a) Which law is illustrated by such a graph?
(b) What should remain constant in a statement of this law?

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Questions Based on High Order Thinking Skills (HOTS)>Q 33
A p.d. of 10 V is needed to make a current of 0.02 A flow through a wire. What p.d. is needed to make a current of 250 mA flow through the same wire?