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A wire when connected to 220 V mains sup...

A wire when connected to 220 V mains supply has power dissipation `P_1`. Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is `P_2`. Then `P_2: P_1` is

A

1

B

4

C

2

D

3

Text Solution

Verified by Experts

The correct Answer is:
B
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MOTION-CURRENT ELECTRICITY-EXERCISE -3 SECTION -B (PREVIOUS YEAR PROBLEMS JEE MAIN)
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  2. A wire when connected to 220 V mains supply has power dissipation P1. ...

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  11. A moving coil galvanometer has 150 equal divisions. Its current sensit...

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  12. For the circuit, the galvanometer G shows zero deflection. If the batt...

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  15. A material 'B' has twice the specific resistance of 'A'. A circular wi...

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  18. In a Wheatstone's bridge, three resistances P,Q and R connected in the...

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  19. An electric bulb is rated 220 volt - 100 watt. The power consumed by i...

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  20. The resistance of a wire is 5 ohm at 50^@C and 6 ohm at 100^@C. The re...

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