Question:

An electric circuit consists of a battery with an emf (electromotive force) of 9 V connected to a resistor with a resistance of 3 Ω. The circuit is closed. Calculate the current flowing through the circuit.

(A) 3 A

(B) 6 A

(C) 9 A

(D) 12 A

Answer:

To calculate the current flowing through the circuit, we can use Ohm's Law, which states that the current (I) flowing through a conductor is equal to the ratio of the voltage (V) across the conductor to the resistance (R) of the conductor. Mathematically, Ohm's Law can be represented as:

I = V / R

Given that the voltage (V) is 9 V and the resistance (R) is 3 Ω, we can substitute these values into the equation to calculate the current.

I = 9 V / 3 Ω

Simplifying the expression, we get:

I = 3 A

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

The correct answer is (A) 3 A.