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The graph between inductive reactance and frequency is 

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Important Questions on Alternating Current

EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
For a given frequency, the inductive reactance of a coil at 100H is 25Ω. For the same frequency, the inductance reactance at 200H will be
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
At 600 Hz, an inductor and capacitor have equal reactances, the ratio of the capacitive reactance to the inductive reactance at 60 Hz  will be
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved ?
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
An alternating voltage of 220 V, 50 Hz frequency is applied across a capacitor of capacitance 2 μF. The impedance of the circuit is
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
Choose the wrong statement for the pure inductive circuit.
MEDIUM
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
An alternating voltage of 220 V, 50 Hz frequency is applied across a capacitor of capacitance 2 μF. The impedance of the circuit is
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
Which of the following represents the variation of inductive reactance XL with the frequency of voltage source ν?
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A series R-C circuit is connected to an alternating voltage source. Consider two situations:

i. When capacitor is air filled.

ii. When capacitor is mica filled.

Current through resistor is i and voltage across capacitor is V then:
HARD
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
An inductance coil has a reactance of 100 Ω . When an AC signal of frequency 1000 Hz is applied to the coil, the applied voltage leads the current by 45°. The self-inductance of the coil is
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor

Three identical emf sources are attached to a single circuit element: a resistor, a capacitor, or an inductor. The current amplitude is then measured as a function of frequency. Which one of the following curve corresponds to inductive circuit?

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EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
An A.C. source is connected to a resistive circuit. Which of the following is true?
HARD
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A voltage VPQ=V0cosωt (where, V0 is a real amplitude) is applied between the points P and Q in the network shown in the figure. The values of capacitance and inductance are C=1ωR3 and L=R3ω. Then, the total impedance between P and Q is
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MEDIUM
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
An alternating voltage e=2002sin⁡100 t volt is connected to 1 μF capacitor through AC ammeter. The reading of ammeter is
HARD
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor

In the given circuit the AC source has ω=100 rad s-1. Considering the inductor and capacitor to be ideal, what will be the current I flowing through the circuit?

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EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A small signal voltage Vt=V0sin⁡ωt is applied across an ideal capacitor C:
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A bird sitting on a single high tension wire does not get electrocuted because
MEDIUM
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
For the LCR circuit, shown here, the current is observed to lead the applied voltage. An additional capacitor C′ , when joined with the capacitor C present in the circuit, makes the power factor of the circuit unity. The capacitor C′ , must have been connected in:
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EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A sinusoidal voltage with a frequency of 50 Hz is applied to a series LCR circuit with a resistance of 5 Ω, inductance of 20 mH and a capacitance of 500 μF. The magnitude of impedance of the circuit is close to
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A series LR circuit is connected to a voltage source with Vt=V0sinωt . After a very large time, current It behaves as t0≫LR:
MEDIUM
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A resistance R draws power P when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes Z , the power drawn will be: