Question

1. Two 20 v batteries are in series, connected positive pole to negative pole. They each have internal resistance of 5 Ω. What power is dissipated in one of the batteries? 1). 80 watts. 2). 200 watts 3). 150 watts 4). 50 watts

2. A 12 μF capacitor is charged using a 7.0 v battery. The battery is then removed and a 1.5 MΩ resistor is connected to the capacitor. How many seconds pass before the voltage across the resistor is 3.0 volts? 1). 2.1 seconds 2). 6.0 seconds 3). 12.9 seconds 4). 15.3 seconds

Answer 1

The power dissipated and time to discharge at voltage