Question

Find Current, if Resistance = 50 ohms and Power = 100 Watts 
1. 2 A
2. 1.414 A
3. 3 A
4. 1.314 A

Answer 1

Correct Answer - Option 2 : 1.414 A

Concept:

The power dissipated by a resistor is given by:

\(P=I^2R=\frac{V^2}{R}\)

I = Current flowing across the resistor

V = Voltage across the resistor

Calculation:

Given P = 100 Watts and R = 50 Ω

\(I=\sqrt {\frac{P}{R}}=\sqrt{\frac{100}{50}}\)

I = 1.414 A