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A resistor develops 500 J of thermal ene...

A resistor develops 500 J of thermal energy in 20 s when a current of 1.5A is passed through it. If the current is increased from 1.5 A to 3 A, what will be the energy developed in 20 s.

A

1000J

B

500 J

C

1500 J

D

2000 J

Text Solution

Verified by Experts

The correct Answer is:
D
Heat `=I^(2)Rt`
`H_(1)/H_(2) = I_(1)^(2)/I_(2)^(2)` as R, t is same for both cases.
`500/H_(2) =(1.5/3)^(2)`
`H_(2) = 500 xx 4`
= 2000 Joule.
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