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» CBSE Physics Current Electricity Expected Questions : Unit II : CBSE Sample Question Papers

CBSE Physics Current Electricity Expected Questions : Unit II

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Short Answer Type Question

Q. 1. How does the resistance depends upon the temperature ?
Answer :

Q. 2. What is temperature coefficient of resistance ?
Answer :

Q. 3. What is dangerous to human body, the current or voltage ?
Answer :

Q. 4. An electron is released from rest in an electric field, it starts to move to points of higher or lower potential ? Explain.
Answer :

Q. 5. Why velocity of electron between collision is different from its drift velocity ?
Answer :

Q. 6. For sensitive measurement what type of potentiometer do you prefer, one of long or of short length ?
Answer :

Q. 7. Why a potentiometer is preferred to voltmeter ?
Answer :

Q. 8. On what factors, the internal resistance of a cell depend ?
Answer :

Q. 9. Although every substance has a very large number of electrons but no current flows unless a potential difference is applied across its ends. Why so ?
Answer :

Q. 10. How does drift velocity depend upon electric field ?
Answer :

Q. 11. What causes death when one gets electric shocks ?
Answer :

Q. 12. What happens when a person falls on a 11,000 V wire ?
Answer :

Q. 13. Why Wheatstone bridge method is preferred to other methods for measuring resistance ?
Answer :

Q. 14. When is Wheatstones bridge most accurate ?
Answer :

Q. 15. Our resistance is about 20,000 ohm yet our body gets shock when we touch a 200 V cable. Why ?
Answer :

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