Question

When a battery does 120 J of work on 10C of charge, the voltage it supplies is

110 V
12 V
1200 V
none of these

Answer 1

Voltage is not the same as energy. A motorcycle battery and a car battery can have the same voltage, yet one can store more energy than the other because it moves more charge.

Step-by-step explanation:

Voltage is not the same as energy. Voltage is the energy per unit charge. Thus, a motorcycle battery and a car battery can both have the same voltage (more precisely, the same potential difference between battery terminals), yet one stores much more energy than the other because AU = qAV. The car battery can move more charge than the motorcycle battery, although both are 12-V batteries.

Answer 2

When a battery performs 120 J of work on 10 C of charge, the voltage supplied is 12 V, calculated using the formula V = W/Q.

Step-by-step explanation:

When a battery does 120 J of work on 10 C of charge, the voltage it supplies is calculated using the relationship between work (energy), charge, and voltage. The formula for voltage is V = W/Q, where V is voltage, W is work in joules, and Q is charge in coulombs. In this case, we would calculate it by taking 120 J (the work done) and dividing it by 10 C (the charge), resulting in 12 V as the correct voltage.

12 V is the correct answer, as this is the potential difference (voltage) across the battery's terminals needed to do 120 J of work on a 10 C charge.