MEDIUM
12th Jharkhand Board
IMPORTANT
Earn 100

Define reactance and impedance in A.C. circuits. Derive expression for instantaneous current in a series L-C-R circuit if connected to an alternating emf.

Important Questions on Alternating Current

EASY
12th Jharkhand Board
IMPORTANT
The phase difference between current and voltage in an ac circuit containing resistance only is
HARD
12th Jharkhand Board
IMPORTANT
Derive an expression for average or mean value of alternating current for half cycle.
HARD
12th Jharkhand Board
IMPORTANT
What is a transformer? Describe the principle, construction and working method of a transformer.
EASY
12th Jharkhand Board
IMPORTANT
In a series LCR circuit L=8 HC=0.5 μF and R=100 Ω. The resonant frequency of the circuit is
MEDIUM
12th Jharkhand Board
IMPORTANT
The phase difference between current and voltage in an A.C. circuit containing inductance only is.