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If two wires having resistance R and 2 R...

If two wires having resistance R and 2 R . Both joined in series and in parallel then ratio of heat generated in this situation, applying the same voltage,

A

`2:1`

B

`1:2`

C

`2:9`

D

`9:2`

Text Solution

Verified by Experts

The correct Answer is:
C
In series
`R_(eq) = 3R, H_(S) = V^(2)/(3R)`
In parallel,
`R_(eq) =(2R)/3, H_(P) = V^(2)/(2R//3)`
`H_(S)/H_(P) = 1/(3R) xx (2R)/3 = 2/9`
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