Question

What is the thermal energy developed when a current of 1.5 A passed through a resistor of resistance
of 10ohm for 10 seconds ?

Answer 1

Question

What is the thermal energy developed when a current of 1.5 A passed through a resistor of resistance of 10ohm for 10 seconds?

Solution

We are given:

$$I = 1.5 \text{A}$$ $$R = 10 \text{ Ohm}$$ $$t = 10 \text{ s}$$

According to the Joule-Lenz law: $Q = I^2 \cdot R \cdot t$.

where $Q$ – thermal energy (J), $I$ – current (A), $R$ – resistance (Ohm), t-time (s).

Calculating: $Q = I^2 \cdot R \cdot t = 1.5^2 \cdot 10 \cdot 10 = 22.5 \text{ J}$

Answer: 22.5 J