AP Physics 1 Exam Question

Consider a circuit consisting of a battery with an electromotive force (emf) of 12V and a resistance of 4Ω. The circuit is connected to a light bulb.

1. Calculate the current flowing through the circuit.

Answer

We can use Ohm's Law to calculate the current flowing through the circuit. Ohm's Law states that the current (I) in a circuit is equal to the ratio of the voltage (V) across the circuit to the resistance (R) within the circuit, represented by the equation:

Given:

• Emf (V) = 12V
• Resistance (R) = 4Ω

Using Ohm's Law, we can substitute the given values into the equation to find the current (I):

Calculating further,

Therefore, the current flowing through the circuit is 3 Amperes.