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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 ?
MEDIUM
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
The phase difference between current and voltage in an A.C. circuit containing inductance only is.
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
Choose the wrong statement for the pure inductive circuit.
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A pure inductor of, 30.0 mH is connected to a source of, 250 V. Find the inductive reactance (in Ω) and R.M.S. current (in A) in the circuit if the frequency of the source is 80 Hz
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?
MEDIUM
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
The equation of current in a purely inductive circuit is 5sin49πt-30°. If the inductance is 30mH then the equation for the voltage across the inductor, will be
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

The phase difference between voltage and current when an ac source is connected to an inductor. :

 

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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EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
Given below are two statements :
Statement-I: The reactance of an AC circuit is zero. It is possible that the circuit contains a capacitor and an inductor.
Statement-II: In AC circuit, the average power delivered by the source never becomes zero.
In the light of the above statements, choose the correct answer from the options given below
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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MEDIUM
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A sinusoidal voltage Vt=210sin3000t volt is applied to a series LCR circuit in which L=10 mH,C=25 μF and R=100Ω. The phase difference Φ between the applied voltage and resultant current will be 
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
An alternating voltage source V=260sin(628t) is connected across a pure inductor of 5 mH. Inductive reactance in the circuit is:
EASY
Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Inductor
A coil of inductance 0.1 H and resistance 110 Ω is connected to a source of 110 V and 350 Hz. The phase difference between the voltage maximum and the current maximum is
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: