The coil of a moving iron instrument has a resistance of 500 Ω and an inductance of 1 H. It reads 250 V when a 250 V dc is applied. If series resistance is 2000 Ω, its reading when fed by 250 V, 50 Hz ac will be

• 260 V
• 252 V
• 250 V
• 248 V

Correct Answer: 248 V

Explanation: