Question

An electric lamp is connected to 220 V, 50 Hz supply. Then the peak value of voltage is

• A. 210 V
• B. 211 V
• C. 311 V
• D. 320 V

Answer 1

Answer: (C)

311 V

Answer 2

$V _ { 0 } = V _ { r m s } \times \sqrt { 2 } = 220 \times \sqrt { 2 } = 310$