Question

In the circuit shown in the figure, the A.C. source gives a voltage V = 20 cos (2000 t) volt. Neglecting source resistance, select correct alternative(s).

• A. The reading of voltmeter is 0 V
• B. The reading of voltmeter is 5.6 V
• C. The reading of ammeter is 1.4 A
• D. The reading of ammeter is 0.47 A

Answer 1

Answer: (B), (C)

The correct options are
B The reading of voltmeter is 5.6 V
C The reading of ammeter is 1.4 A

Here, $V_P=20$ volt and $\omega =2000$ rad/s

At resonance condition, the current in the circuit $I=\frac{V_{rms}}{R}=\frac{V_P/\sqrt{2}}{6+4}=$