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Q.

Case Study
An experiment was set up with the circuit diagram shown in figure. Given that $R_{1} = 10 Ω,$ $R_{2} = R_{3} = 5 Ω, r = 0 Ω a n d E = 5 V$
The power dissipated in $R_{1}$ is:

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a

2 W

b

2.5 W

c

3 W

d

4.5 W

answer is B.

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Detailed Solution

Power dissipation through $R_{1}, P = {(\frac{1}{2})}^{2} . 10 = \frac{10}{4} = 2 .5 W$

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