For an electric circuit given below, the correct combination of voltage (V) and current (I) is

  1. A. V=900~V; I=18~A
  2. B. V=300~V; I=5.5~A ✓
  3. C. V=600~V; I=1~A
  4. D. V=300~V; I=2~A

Correct Answer: B. V=300~V; I=5.5~A

Explanation

The circuit has three resistors (100~\Omega, 200~\Omega, 300~\Omega) in parallel. An ammeter reads 3A through the 100~\Omega branch. Voltage V = I \times R = 3 \times 100 = 300~V. Total current I = \frac{300}{100} + \frac{300}{200} + \frac{300}{300} = 3 + 1.5 + 1 = 5.5~A.

Related questions on Physics

Practice more NDA GAT questions