Question

A resistor of 3 ohms is connected to a battery with an electromotive force (e.m.f) of 6 volts. If the internal resistance of the battery is 20 ohms, calculate the current flowing in the circuit.

a) 0.15 A
b) 0.3 A
c) 0.6 A
d) 1.5 A

Answer 1

The current flowing in the circuit is approximately 0.26 A.

Step-by-step explanation:

To calculate the current flowing in the circuit, we need to use Ohm's law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R). In this case, the voltage is the electromotive force (e.m.f) of the battery, which is 6 volts, and the resistance is the sum of the resistor and the internal resistance of the battery, which is 3 ohms + 20 ohms = 23 ohms. So, the current flowing in the circuit is:

I = V / R = 6 V / 23 Ω ≈ 0.26 A

Therefore, none of the options given (a, b, c, d) is correct. The correct answer is approximately 0.26 A.