Home
Class 12
PHYSICS
A rectangular coil of 300 turns has an...

A rectangular coil of 300 turns has an average area of 25 cm `xx` 10 cm . The coil rotates with a speed of 50 cps in a uniform magnetic field of strength `4xx10^(-2)` T about an axis perpendicular of the field . The peak value of the induced e.m.f is ( in volt ) :

A

`3000pi`

B

`300pi`

C

`30pi`

D

`3pi`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise PRACTICE EXERCISE (MOTIONAL EMF)|4 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise PRACTICE EXERCISE (SELF INDUCTANCE AND MUTUAL INDUCTANCE)|12 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise EXERCISE - II (DC CIRCUITS)|5 Videos

  • ELECTRIC FIELD AND POTENTIAL

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|26 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH SERIES|Exercise EXERCISE -II|22 Videos

Similar Questions

Explore conceptually related problems

A rectangular coil of 300 turns has an average area of average area of 25 cmxx10 cm the cooil rotates with a speed of 50 cps in a uniform magnetic field of strength 4xx10^(-2)T about an axis perpendicular of the field. The peak value of the induced e.m.f. is (in volt)

A rectangular coil 20 cm xx 10 cm having 500 turns rotates in a magnetic field of 5 xx 10^(-3) T with a frequency of 1200 rev min^(-1) about an axis perpendicular to the field.

A coil is rotated in a uniform magnetic field about an axis perpendicular to the field. The emf induced in the coil would be maximum when the plane of coil is :

A circular coil of 100 turns has an effective radius of 0.05 m and carries a current of 0.1 A. How much work is required to turn it in an external magnetic field of 1.5 Wb m^-2 through 180^@ about an axis perpendicular to the magnetic field. The plane of the coil is initially perpendicular to the magnetic field.

An a.c generator consists of a coil of 1000 turns each of area 100 cm^(2) and rotating at an angular speed of 100 rpm in a uniform magnetic field fo 3.6 xx 10^(2) T. Find the peak and r.m.s value of e.m.f induced in the coil.

A rectangular coil having 60 turns and area of 0.4 m^(2) is held at right angles to a uniform magnetic field of flux density 5 xx 10^(-5)T . Calculate the magnetic flux passing through it.

A coil of area 0.1m^(2) has 500 tums. After placing the coil in a magnetic field of strength 4xx10^(-4)Wb//m^(2) it is rotated through 90^(@) in 0.1 s. The average emf induced in the coil is

A rectangular coil of 100 turns has length 5 cm and width 4 cm. it is placed with its plane parallel to a uniform magnetic field and a current of 2 A is sent through the coil. Find the magnitude of the magnetic field B, if the torque acting on the coil is 0.2 Nm^(-1).

A coil having 200 turns has a surface area of 0.15m^(2) . A magnetic field of strength 0.2T applied perpendicular to this changes to 0.6T in 0.4s , then the induced emf in the coil is __________V.

A rectangular coil of area A rotates in a uniform magnetic field B with angular velocity about an axis perpendicular to the field, initially the plane of coil is perpendicular to the field,then the avarage induced e.m.f. after rotating by 90° is