Electromagnetic Induction PYQs - Last 5 Years

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Practice 30 AP EAPCET Physics questions from Electromagnetic Induction. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 5 Years Electromagnetic Induction Questions

Showing 30 of 30 filtered questions.

1Electromagnetic Induction

A coil having 100 square loops each of side 10 cm is placed such that its plane is normal to a magnetic field, which is changing at a rate of $0.7 \mathrm{Ts}^{-1}$. The emf induced in the coil is

2Electromagnetic Induction

The self inductance of an air-cored solenoid of length 40 cm , diameter 7 cm having 200 turns is nearly

3Electromagnetic Induction

When current in a coil changes from 2 A to 5 A in time of 0.3 s , if the emf induced in the coil is 40 mv , then the self inductance of the coil is

4Electromagnetic Induction

A coil of resistance $200 \Omega$ is placed in a magnetic field. If the magnetic flux $\phi$ (in weber) linked with the coil varies with time ' $t$ ' (in second) as per the equation $\phi=50 t^2+4$, then the current induced in the coil at a...

5Electromagnetic Induction

If a wheel with 24 metallic spokes each 40 cm long is rotated with a speed of $180 \mathrm{rev} / \mathrm{min}$ in a plane normal to the horizontal component of Earth's magnetic field, the emf induced between the axle and the rim of the whe...

6Electromagnetic Induction

When a current of 4 mA passes through an inductor, if the flux linked with it is $32 \times 10^{-6} \mathrm{Tm}^2$, then the energy stored in the inductor is

7Electromagnetic Induction

A coil of 45 turns and radius 4 cm is placed in a uniform magnetic field such that its plane is perpendicular to the direction of the field. If the magnetic field increases from 0 to 0.70 T at a constant rate in a time interval of 220 s , t...

8Electromagnetic Induction

A metallic disc of radius 0.3 m is rotating with a constant angular speed of $60 \mathrm{rad} \mathrm{s}^{-1}$ in a plane perpendicular to a uniform magnetic field of $5 \times 10^{-2} \mathrm{~T}$. The emf induced between a point on the ri...

9Electromagnetic Induction

A horizontal telegraph wire of length 30 m spread east to west fell down freely from a height of 20 m . If the resistance of the wire is $40 \Omega$ and the horizontal component of the Earth's magnetic field at the place is $2 \times 10^{-5...

10Electromagnetic Induction

In a circuit the current falls from a 14 A to 4 A in a time 0.2 ms . If the induced emf is 150 V , then the self-inductance of the circuit is

11Electromagnetic Induction

A coil of inductance $L$ is divided into 6 equal parts. All these are connected in parallel. The resultant inductance of this combination is

12Electromagnetic Induction

A metallic wire loop of side $(l) 0.1 \mathrm{~m}$ and resistance of $1 \Omega$ is moved with a constant velocity in a uniform magnetic field of $2 \mathrm{Wm}^{-2}$ as shown in the figure. The magnetic field is perpendicular to the plane o...

13Electromagnetic Induction

$X$ and $Y$ are two circuits having coefficient of mutual inductance 3 mH and resistance $10 \Omega$ and $4 \Omega$ respectively. To have induced current $60 \times 10^{-4} \mathrm{~A}$ in circuit $Y$, the amount of current to be changed i...

14Electromagnetic Induction

The current passing through a coil of 120 turns and inductance 40 mH is 30 mA . The magnetic flux linked with the coil is

15Electromagnetic Induction

The ratio of the number of turns per unit length of two solenoids $A$ and $B$ are 1:3 and the lengths of $A$ and $B$ are in the ratio $1: 2$. If the two solenoids have same cross-sectional area, the ratio of the self-inductances of the sole...

16Electromagnetic Induction

Magnetic field at a distance of $r$ from $Z$-axis is $B=B_0$ $r t \hat{\mathbf{k}}$ present in the region. $B_0$ is constant and $t$ is time. The magnitude of induced electric field at a distance of $r$ from $Z$-axis is

17Electromagnetic Induction

If the current through an inductor increases from 2A to 3A. The magnetic energy stored in the inductor increases by

18Electromagnetic Induction

In an AC generator, if coils of $N$ turns and area $A$ is rotated at $v$ revolutions per second in a uniform magnetic field $B$, then the motional emf produced is equal to (At $t=0 \mathrm{~s}$, the coil is perpendicular to the field)

19Electromagnetic Induction

The Lenz's law is associated with

20Electromagnetic Induction

A circular loop of wire of radius 14 cm is placed in magnetic field directed perpendicular to the plane of the loop. If the field decreases at a steady rate of \(0.05 \mathrm{~Ts}^{-1}\) in some interval, then the magnitude of the emf induc...

21Electromagnetic Induction

A circular coil has 100 turns, radius 3 cm and resistance \(4 \Omega\). This coil is co-axial with a solenoid of 200 turns/\(\mathrm{cm}\) and diameter 4 cm . If the solenoid current is decreased from 2 A to zero in 0.04 s , then the curren...

22Electromagnetic Induction

Assertion (A) When plane of coil is perpendicular to magnetic field, magnetic flux linked with the coil is minimum, but induced emf is zero.
Reason (R) \(\phi=n A B \cos \theta\) and \(e=\frac{d \phi}{d t}\)

23Electromagnetic Induction

The induced emf cannot be produced by

24Electromagnetic Induction

Assertion (A) Magnetic flux is a vector quantity.
Reason (R) Value of magnetic flux can be positive negative or zero.

25Electromagnetic Induction

An AC generator consists of a coil of 100 turns and is of cross-sectional area \(3 \mathrm{~m}^2\). It is rotating at a constant angular speed of \(60 \mathrm{~rads}^{-1}\) in a uniform magnetic field of \(0.04 \mathrm{~T}\). Resistance of ...

26Electromagnetic Induction

The law which states that a variation in an
electric field causes magnetic field, is

27Electromagnetic Induction

Two inductors A and B when connected in
parallel are equivalent to a single inductor of
inductance 1.5 H and when connected in
series are equivalent to a single inductor of
inductance 8H. Find the difference in the
inductances of A and B.

28Electromagnetic Induction

Assertion (A) It is more difficult to move a
magnet into a coil with more loops.
Reason (R) This is because emf induced in
each current loop resists the motion of the
magnet.

29Electromagnetic Induction

An electric generator is based on

30Electromagnetic Induction

A solenoid of length \(60 \mathrm{~cm}\) with 15 turns per \(\mathrm{cm}\) and area of cross-section \(4 \times 10^{-3} \mathrm{~m}^2\) completely surrounds another co-axial solenoid of same length and area of cross-section $$2 \times 10^{-...