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A constant voltage is applied between th...

A constant voltage is applied between the two ends of a metallic wire. If both the length and the radius of the wire are doubled, the rate of heat developed in the wire 

A

will be doubled

B

will be halved

C

will remain the same

D

will be quadrupled

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - IA
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  2. Which of following causes production of heat, when current is set up i...

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  3. A constant voltage is applied between the two ends of a metallic wire....

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  4. According to Joule's law, if the potential difference across a conduct...

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  5. A resistor R(1) dissipates the power P when connected to a certain gen...

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  6. Appliances based on heating effect of current work on

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  7. The electric power transferred by a cell to an external resistance is ...

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  8. When electric bulbs of same power, but different marked voltage are co...

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  9. Choose the correct statement

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  10. For a cell which charging in a circuit

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  11. The dimensional formula of the emf of a source of current are same as ...

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  12. Internal resistance of a cell depends on

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  13. When cells are arranged in series

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  14. To supply maximum current, cells should be arrange in

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  15. The terminal Pd of a cell is equal to its emf if

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  16. Back emf of a cell is due to

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  17. When an electric cell drives current through load resistance, its Back...

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  18. Which depolarizers are used to neutralizes hydrogen layer in cells

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  19. Two batteries of emfs epsilon(1) and epsilon(2) (epsilon(2) gt epsilon...

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  20. A battery consists of a variable number n of identical cells having in...

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