Question

The resistor $R_1 = 3 \ \Omega$ and $R_2 = 1 \ \Omega$ are connected in parallel to a 20 V battery. Find the heat developed in the resistor $R_1$ in one minute

• A. 600 J
• B. 800 J
• C. 6000 J
• D. 8000 J
• E. 7000 J

Hint:

When resistors are in parallel, use $H = \frac{V^2}{R}t$ because the voltage is the same. When they are in series, use $H = I^2Rt$ because the current is the same.

Answer 1

The Correct Option is D