Verified Solution • 2025–26 Session moderate

QPages 330-331: Q2: HC Verma: Concepts of Physics - Volume 2 Alternating Current Pages 330-331: Q2 Solution: The household supply of electricity is at 220 V rms value) and…

The household supply of electricity is at 220 V rms value) and 50 Hz. Find the peak voltage and the least possible time in which the voltage can change from the rms value to zero.

Step-by-Step Verified Solution

**Answer:** Peak voltage ≈311 V\approx 311 \, \text{V}, time =2.5×10−3 s= 2.5 \times 10^{-3} \, \text{s}. **Step-by-Step Explanation:** E0=2Erms=2×220≈311 VE_0 = \sqrt{2} E_{rms} = \sqrt{2} \times 220 \approx 311 \, \text{V}. The voltage changes from rms to zero in T/8=0.02/8=2.5×10−3 sT/8 = 0.02/8 = 2.5 \times 10^{-3} \, \text{s} [citation:6].

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