If ε = 20 V,at what rate is thermal energy being generated in the 40-Ω resistor?
A) 26 W
B) 1.6 W
C) 3.3 W
D) 15 W

Question

If ε = 20 V,at what rate is thermal energy being generated in the 40-Ω resistor? 
A) 26 W 
B) 1.6 W 
C) 3.3 W 
D) 15 W

Quizplus · Accepted Answer

We can use the formula P = V^2/R to calculate the power being generated in the resistor, where P is the power, V is the voltage across the resistor, and R is the resistance.

Here, V = ε = 20 V and R = 40 Ω.

Plugging in these values, we get:

P = (20 V)^2 / 40 Ω = 1000 mW = 1 W

Therefore, the rate at which thermal energy is being generated in the resistor is 1 W.

The correct answer is C) 3.3 W.

This implies that the options are not accurate or are incomplete.

If ε = 20 V,at What Rate Is Thermal Energy