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What is the power $P$ dissipated by a resistor of $R = 5 \text{ } \Omega$ when a current of $I = 2 \text{ } \text{A}$ flows through it?
- A.$10 \text{ } \text{W}$
- B.$20 \text{ } \text{W}$
- C.$25 \text{ } \text{W}$
- D.$50 \text{ } \text{W}$
Show correct answer & step-by-step solution
Correct answer: B — $20 \text{ } \text{W}$
Solution
The power is calculated as .
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