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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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Very Short Answer Type Question

Q. 1. What is unit of charge ?
Answer :

Q. 2. What are units of potential and current ?
Answer :

Q. 3. A heavy current is passed through a wire, is it charged ?
Answer :

Q. 4. What is unit of resistance ? Define it.
Answer :

Q. 5. What are the factors upon which resistance of a conductor depends ?
Answer :

Q. 6. What is specific resistance, resistivity of a wire ? Is it more for thick or thin wire ?
Answer :

Q. 7. What is unit of conductivity ?
Answer :

Q. 8. How much is the drift velocity of electron ?
Answer :

Q. 9. What is non-ohmic resistance ? Give one example.
Answer :

Q. 10. What is the order of resistivity of an insulator ?
Answer :

Q. 11. Which one.will you prefer to measure e.m,f. of a cell, a potentiometer or a voltmeter ?
Answer :

Q. 12. Resistivites of copper, constantan and silver are 1.78 X 10-8 ohm m ; 49.1 X 10-8 and 1.6 X 10-8 ohm m respectively. Which is the best conductor and why ?
Answer :

Q. 13. The colour code on a carbon resistor is n shown in figure. What is the resistance ?
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Q. 14. The four lines on a resistor are as hown. What is its the resistance ?
Answer :

Q. 15. What is approximately the resistance of dry human body ?
Answer :

Q. 16. What alloys are used to make standard resistors ?
Answer :

Q. 17. Is internal resistance a defect in the cell ?
Answer :

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