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Jay Ghosh

When a lamp is connected to an alternating voltage supply, it lights with the same brightness as when connected to a 12 V d.c. battery. what is the peak value of alternating voltage source?

The peak voltage of alternating voltage source Vm = 12 × √2 , V = 17 V. Class 12 Physics Chapter 7 Alternating current Session 2024-2025.

Jay Ghosh

Equivalent value of d.c. = I effective = Im/√2 . Class 12 Physics Chapter 7 Alternating current Session 2024-2025.

Jay Ghosh

Equation for instantaneous voltage is V = 220 × √2 sin 2π (50)t = 311 sin 314t. Class 12 Physics Chapter 7 Alternating current Session 2024-2025.

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