Correct Answer - Option 4 : 960 Ω
Concept:
Electric Power:
- The rate of consumption of electrical energy is electric power.
- The SI unit of power is Watt.
- The power dissipated by an electrical device at potential difference across it V, and resistance R is given as
\(P = \frac{V^2}{R}\)
P is power, V is the potential difference, R is resistance
Calculation:
Given Power P = 60 W
Potential difference V = 240 Volt.
Resistance R = ?
\(R = \frac{V^2}{P}\)
\(\implies R = \frac{240^2}{60} \Omega\)
⇒ R = 960 Ω
So, the correct option is 960 Ω.