Recent questions in Physics

0 votes

0 answers

A circular disc of radius `0.2 m` is placed in a uniform magnetic field of induction `(1'/'pi) Wbm^(-2)` in such a way that its axis makes an angle of 60° with B. The magnetic flux linked with the disc

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

According to Faraday’s law of electromagnetic induction, the magnitude of the induced emf in a circuit is equal to the time rate of change

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The flux linked with a circuit is given by `phiB = t^2 +2`. The graph between time (X-axis) and induced emf (Y-axis) will be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A square loop of wire, side length `10 cm` is placed at angle of 45° with a magnetic field that changes uniformly from 0.1 T to zero in `0.7s`. The induced current in the loop (its resistance is 111)

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Lenz’s law of electromagnetic induction corresponds to the law of conservation

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The North-pole of a long horizontal bar magnet is being brought closer to a vertical conducting plane along the perpendicular direction. The direction of induced current in the conducting plane will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

An infinitely long cylinder is kept parallel to a uniform magnetic field B directed along positive Z-axis. The direction of induced current as seen from the Z-axis will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The figure shows certain wire segments joined together to form a co-planar loop. The loop is placed in a perpendicular magnetic field in the direction going into the plane of the figure. The magnitude of the field increases with time and `I_1 & I_2` are the currents in the segment `ab & cd`.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The North-pole of a magnet is falling on a metallic ring as shown in the figure. The direction of induced current, if looked from upside, in the ring will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A conducting rod of length `l` is falling with a constant velocity `v` perpendicular to a uniform horizontal magnetic field `B`. The potential difference between its two ends will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A rectangular conductor `SPQR` is placed in a uniform magnetic field perpendicular to the plane and extending from `x=0` to `x=b` as shown below. The arm `PQ` of length `l` is moving from `x=0` to `x=2b` with constant speed `v`. Find the flux and emf induced in the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The magnitude of the earth’s magnetic field at a place is `B_0` and the angle of dip is `delta`. A horizontal conductor of length `L` lying in magnetic North-South moves eastwards with a velocity `v`. The emf induced across the conductor

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A circular coil of mean radius of 7 cm and having 4000 turns is rotated at the rate of 1800 rev/min in the earth’s magnetic field `(B = 0.5 G)`, the maximum emf induced in coil will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Eddy currents are produced,

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In induction furnace, heat is produced due

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Which of the following is not an application of eddy

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Amongst the following physical parameter, which is equivalent to

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The self-inductance of a coil having 500 turns is `50 mH`. The magnetic flux through the cross-sectional area of the coil while current through it is 8 mA, is found to

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

If emf induced in a coil is `2V` by changing the current in it from `8A` to `6A` in `2 xx 10^(-3) s`, then the coefficient of self-induction

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A long solenoid has 1000 turns. When a current of `4 A` flows through it, the magnetic flux linked with each turn of the solenoid is `4 xx 10^(-3)Wb`. The self-inductance of the solenoid

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

Recent questions in Physics

Categories