Question

The range of the voltmeter is 'V' when 50 n resistance is connected in series. Its range gets doubled when 500 Ω resistance is connected in series. The resistance of voltmeter is ______.

Options

• 600 Ω

• 400 Ω

• 200 Ω

• 800 Ω

Answer 1

The range of the voltmeter is 'V' when 50 n resistance is connected in series. Its range gets doubled when 500 Ω resistance is connected in series. The resistance of voltmeter is 400 Ω.

Explanation:

2(G + 50)i = (G + 500)i

20 + 100 = G + 500

G = 400 Ω