The device is based on the principle of mutual induction is:
Question types
Electromagnetic Induction question types
118 questions across 7 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.
118
Questions
7
Question groups
5
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01
M.C.Q (1 Marks)
36 Q→021 Marks Question
35 Q→032 Marks Questions
14 Q→043 Marks Question
5 Q→054 Marks Questions
2 Q→065 Marks Questions
16 Q→07Fill in the blanks.
10 Q→Sample Questions
Electromagnetic Induction questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
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In the given figure, an electron is moving from A to B. The direction of A induced current in the loop is:
A rectangular coil is rotating with a uniform angular velocity between magnetic poles. The correct graph of change of magnetic flux $\phi$ passing through the coil and induced emf (c) with time is :
View full solution →A coil of copper and a wire AB are located in the plane of the paper as shown in the figure. If current I flowing through the wire is increasing, then the direction of induced current in the coil is:
Lenz's law gives:
What is the effect of core on self-induction?
Volt $-$ second is unit of which physical quantity?
View full solution →Graph between magnetic flux $\phi$ and electric current $I$ for two inductors $A$ and $B$ is given in the figure. The magnitude of self-inductance will be more for whom?
View full solution →In the given figure, magnitude of current is increasing in the wire xy from x to y . Is there any induced current in a loop placed near the wire?
What will be the magnitude of induced current in circular loop KLMN of radius $r$ if constant current of $1 A$ is passed in straight wire $P Q$ ?
View full solution →A 5 m long straight horizontal conducting wire situated in the east to west direction is falling with a speed of $2 m / s$ perpendicular to the horizontal component of the earth magnetic field of $0.3 \times 10^{-4} T$. Find the instantaneous value of the emf induced between the ends of the wire.
View full solution →State factors on which coefficient of mutualinductance between two coils depend.
A lamp attached to a cycle glows by a dynamo. When cycle is moved at greater speed, the lamp glows brightly and when cycle moves with a lesser speed, it glows dimly. Why?
Think over the experiment number 2 of Faraday and Henry and tell :
(a) What will you do to obtain more deflection in the galvanometer?
(b) How will you show the presence of current in the absence of a galvanometer?
(a) What will you do to obtain more deflection in the galvanometer?
(b) How will you show the presence of current in the absence of a galvanometer?
What will be the effect on induced charge and induced current when change in magnetic flux associated with it is either done with increased rate or decreased rate?
Draw a clear and labelled diagram of an alternating current generator.
Write statement of Lenz's law of electromagnetism. A 2 m long straight vertical wire is falling perpendicularly to horizontal component at speed of 5 $m / s$ in the magnetic field of earth of $0.3 \times 10^{-4} T$. Calculate the magnitude of instantaneous value of induced emf across the ends of the wire.
View full solution →What will be maximum mutual inductance between coils of self-inductance $L_1$ and $L_2$ ?
View full solution →Radius of a disc of copper is 10 cm . It is rotating about an axis which is perpendicular to its plane and passing through its centre at the rate of $20 \pi rad /$ second. Uniform magnetic field of 0.2 T is working perpendicular to the disc. (i) Calculate potential difference between axis and circumference of the disc. (ii) If resistance of disc is 2 , then what is the magnitude of induced current?
View full solution →A horizontal straight wire 10 m long extending from east to west is falling with a speed of $5.0 ms^{-1}$, at right angles to component of the earth's magnetic field $0.30 \times 10^{-4} Wbm ^{-2}$.
(a) What is the instantaneous value of the emf induced in the wire?
(b) What is the direction of the emf?
(c) Which end of the wire is at the higher electrical potential?
View full solution →(a) What is the instantaneous value of the emf induced in the wire?
(b) What is the direction of the emf?
(c) Which end of the wire is at the higher electrical potential?
A square loop of a metallic wire of side 10 cm whose resistance is 1 ohm is moving with a constant velocity of as shown in the figure in a uniform magnetic field of $200 Wb / m ^2$. The magnetic field is normal to the plane of paper inwards. This loop is connected to a network of resistors of magnitude 3 ohms. Resistance of wire OS and PQ are negligible. What will be the magnitude of velocity, $v_0$ to flow one ampere of direct current in the loop? Also, what will be the direction of current?
View full solution →Predict the direction of induced current in the situations described by the following figures (a) to (f).
Explain AC generator by drawing a labelled diagram. Obtain an expression for instantaneous magnitude of induced electromotive force.
Explain the experiments of Faraday and Henry for explaining and describing the phenomenon of electromagnetic induction.
Write Faraday's laws of electromagnetic induction and derive them.
What is magnetic flux. Explain factors on which it depends.
With the help of a labelled diagram, explain how does an AC works. There are $N$ turns in coil of AC generator. Area of each turn is A and the coil is rotating with a uniform angular velocity. Establish an expression for generated induced electromotive force. What is the source of energy production by this method?
View full solution →Direction of induced current is obtained by ___________ Law.
Transformer and induction coil are examples of ___________.
Coefficient of self-induction of a long solenoid is L = ___________.
Unit of coefficient of self-induction is ____________.
Dimensions of coefficient of self-inductance are ___________.
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