A 12 V battery will increase the potential energy of 2.1 C of charge by how many joules?

To calculate the potential energy, we need to use the formula:

Potential energy (Joules) = Voltage (Volts) × Charge (Coulombs)

In this case, the voltage is 12 V and the charge is 2.1 C. So, we can substitute these values into the formula:

Potential energy = 12 V × 2.1 C

To find the potential energy value, we simply multiply the two values together:

Potential energy = 12 V × 2.1 C
= 25.2 Joules

Therefore, the 12 V battery will increase the potential energy of 2.1 C of charge by 25.2 Joules.