Read the passage below and answer questions based on it.
An electric lamp of resistance 20Ω and a conductor of resistance 4Ω are connected to a 6V battery as shown in the circuit.
Calculate the potential difference across the electric lamp.
Answer & explanation
Correct answer: option 2
$I = \frac{V}{r+R} = \frac{6}{24} = 0.25A$
$V = IR = 0.25\times 20 = 5V$