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A resistance R = 12 Omega is connected a...

A resistance `R = 12 Omega` is connected across a source of emf as shown in the figure. Its emf changes with time as shown in the graph. What is the heat developed in the resistance in the first 4 s. ?

A

72 J

B

64 J

C

108 J

D

100 J

Text Solution

Verified by Experts

The correct Answer is:
B
b. `H = int_(0)^(4) (E^2)/R (dt) = int_(0)^(4) ((6t)^2dt)/12 = 64J`.
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