A 12 V battery with internal resistance 1 ohm drives a 3 ohm resistor in series with a parallel pair of 6 ohm and 3 ohm resistors. What current flows through the 6 ohm resistor?

Answer and explanation

Correct answer: C. 0.67 A

  1. Step 1: The parallel pair is (6 x 3) / (6 + 3) = 2 ohm. Total resistance = 1 + 3 + 2 = 6 ohm.
  2. Step 2: Total current I = 12 / 6 = 2 A.
  3. Step 3: Voltage across the parallel pair = 2 A x 2 ohm = 4 V, so the current in the 6 ohm resistor = 4 / 6 = 0.67 A.
Answer
0.67 A.
Why not the others: 2.00 A is the total current; 1.33 A is the current in the 3 ohm resistor of the pair; 1.00 A comes from sharing the total current equally.

Practise more Physical and Chemical Principles.

Free questions with an explanation for every one, and full timed Jubilee Institute Admission Test mock tests.

All Physical and Chemical Principles questionsTake a mock test

More Physical and Chemical Principles questions