EASY
12th ICSE
IMPORTANT
Earn 100

In the adjoining circuit, calculate the inductive reactance and the capacitive reactance. What should be the source frequency so that the two reactance become equal in magnitude? What would then be the impedance of the circuit?

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Important Questions on Alternating Current

EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 29

An AC circuit has a resistance and an inductance connected in series, as shown. Calculate the current and the power factor in the circuit.

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EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 30
A current of 1.1 A flows through a coil when connected to a 110 V DC source. When 110 V-50 Hz AC is applied to the same coil, only 0.5 A current flows. Calculate the resistance, impedance and inductance of the coil.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 31
An AC circuit consists of a 220 V, 50 Hz supply connected across a 100 Ω resistor. What inductance should be introduced in the circuit in series with the resistance so that the current is reduced to half?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 32
A coil has a current of 1.0 A and a power of 100 W from an AC source of 110 V and 50 Hz. Find the resistance and the inductance of the coil.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 33
A sinusoidal voltage V=200 sin 314 t is applied to a 10 Ω resistor. Find rms voltage .
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 33
A sinusoidal voltage V=200 sin 314 t is applied to a 10 Ω resistor. Find rms current .
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 33
A sinusoidal voltage V=200 sin 314 t is applied to a 10 Ω resistor. Find power dissipated as heat .
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 34
An emf V=200 sin 377 t volt is applied across an inductance L having a resistance of 1.0 Ω. The maximum current is found to be 10 A. Find the value of L.