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The power dissipated in the circuit shown in the figure is 30 Watts. The value of R is:
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- 20 Ω
- 15 Ω
- 10 Ω
- 30 Ω
Correct Option: C
The power dissipated in the circuit.
| P = | ...(i) | |
| Req |
| 1 | = | 1 | + | 1 | = | 5 + R | ||
| Req | R | 5 | 5R |
| Req = |  | 5R |  | |||
| 5 + R |
P = 30 W
Substituting the values in equation (i)
| = 10 | ||
| 5 + R |
15R = 50 + 10R
5R = 50
R = 10 Ω
