**Chapter-7|Alternating Current |NCERT 12th Physics:**

**AC Voltage Applied to a Resistor:**

Let a resistor of resistance R is connected to an AC source of EMF with instantaneous value V, which is given by

V= V₀Sinωt Or (E= E₀Sinωt)

Comparing I₀= V₀/R with Ohm’s law, we find that registers work equally well for both AC and DC voltage.

**Phase Difference:** Phase angle of V- Phase angle of I

= ωt-ωt=0

Therefore, Current is in same phase with potential.

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