Question

1. A 12-V car battery has an internal resistance of 0.020 Ω. When the headlights and stereo are on, a current of 25.0 A is drawn from the battery. What is the value of the terminal voltage when this current is drawn from the battery? 12 V, 9.0 V, 12.5 V, or 11.5 V

2. A car battery seems to be malfunctioning (not providing the proper voltage and current to start your car). While the car is off and you are not trying to start it, a friend uses a voltmeter to measure the voltage and finds that your battery voltage is 12.0 V, just as it is supposed to be. After the voltage check, you try to start your car again to no avail. Can you rule out the battery as the problem? yes, the voltage was checked or no there could still be something wrong with the battery.

3. Kirchhoff’s junction rule is a consequence of:

The conservation of resistance

The conservation of momentum

The conservation of charge

The conservation of energy

4. Kirchhoff’s loop rule is a consequence of:

The conservation of resistance

The conservation of momentum

The conservation of energy

The conservation of charge

Answer 1