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Question: Two wires have resistance of 2Ω and 4Ω connected to same voltage, ratio of heat dissipated at resist...

Two wires have resistance of 2Ω and 4Ω connected to same voltage, ratio of heat dissipated at resistance is

A

1 : 2

B

4 : 3

C

2 : 1

D

5 : 2

Answer

2 : 1

Explanation

Solution

H=V2RtH = \frac{V^{2}}{R}t ⇒H1H2=R2R1=42=21\frac{H_{1}}{H_{2}} = \frac{R_{2}}{R_{1}} = \frac{4}{2} = \frac{2}{1}