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(A): The coil of a heater is cut into tw...

(A): The coil of a heater is cut into two equal halves and only one of them is used into heater. The heater will now require half the time to produce the same amount of heat.
(R): The heat produced is inversily proportio nal to square of current. 

A

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'

B

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

C

'A' is true and 'R' is false

D

'A' is false and 'R' is false

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - IB
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  6. (A): A person touching a high power line sets stuck with the line. (...

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  7. (A): The coil of a heater is cut into two equal halves and only one of...

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  9. (A): When a battery is short-circuited the terminal voltage is zero ...

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  10. (A): Primary cells can be recharged, but secondary cells can not be re...

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  11. (A): Heat is produced in a resistor when connected across the terminal...

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  15. (A): In metrebridge experiment, a high resis tance is connected in ser...

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  16. (A): Potentiometer is much better than a Voltmeter for measuring emf o...

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  17. (A): In a meter bridge, If its wire is replaced by another wire having...

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  18. (A): A domestic electrical appliances, working on a three pin, will co...

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  19. (A): In the following circuit, emf is 2V and internal resistance of th...

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