Question

a nuclear power station produces 10 gw of electrical power. the power generated by the nuclear reactions in the core of the reactor is 25 gw. the efficiency of the power station is a 15% b. 35% c. 40% d. 60%

Explanation:

Step1: Recall efficiency formula

Efficiency $\eta=\frac{\text{Output Power}}{\text{Input Power}}\times100\%$

Step2: Identify output and input power

Output power $P_{out}=10\ GW$, input power $P_{in}=25\ GW$

Step3: Calculate efficiency

$\eta=\frac{10}{25}\times 100\% = 40\%$

Answer:

C. 40%