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Jay Ghosh

An a.c. I = Im sin wt produces certain heat H in a resistor R over a time T = 2π/w . write the value of d.c. that would produce the same heat in the same resistor in the same time.

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.