Home
Class 12
PHYSICS
A circular coil of cross-sectional area ...

A circular coil of cross-sectional area `200 cm^(2)` and 20 turns is rotated about the vertical diameter with angular speed of `50 rad//s` in a uniform magnetic of `3.0 xx 10^(-2) T`. Calculate the maximum value of current in the coil.

Text Solution

Verified by Experts

Here, `A = 200 cm^(2) = 200 xx 10^(-4) m^(2) = 2 xx 10^(-2) m^(2)`
`N = 20, omega = 50 rad//s, B = 3.0 xx 10^(2) T`
`I_(0) = ?`
`e_(0) N AB omega = 20 xx 2 xx 10^(-2) xx 3.0 xx 10^(-2) xx 50 = 0.6` volt
If R is resistance of the coil, then `I_(0) = (e_(0))/(R ) = (0.6)/(R )` ampere.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    PRADEEP|Exercise Solved Examples (b)|1 Videos

  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    PRADEEP|Exercise Short Answer Qusetions|2 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    PRADEEP|Exercise Exercise|191 Videos

  • ELECTROMAGNETIC WAVES

    PRADEEP|Exercise II Focus multiple choice question|5 Videos

Similar Questions

Explore conceptually related problems

(a) Draw a schematic diagram of an AC generator. Explain is working and obtain the expression for the instantaneous value of the emf in terms of the magnetic field B, number of turns N of the coil of area A rotating with angular frequency omega . Show how an alternating emf is generated by loop of wire rotating in a magnetic field. (b) A circular coil of radius 10 cm and 20 turns is rotated about its vertical diameter with angular speed of 50 rad s^(-1). in a uniform horizontal magnetic field of 3.0xx10^(-2)T . (i) Calculate the maximum and average emf induced in the coil. (ii) If the coil forms a closed loop of resistance 10 Omega , calculate the maximum current in the coil and the average power loss due to Joule heating.

A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad s^(-1) in a uniform horizontal magnetic field of 3.0xx10^(-2) T. The maximum emf induced the coil will be _________ xx 10^( -2) volt (rounded off to the nearest integer).

A circular coil of radius 8.0 cm and 20 turns rotates about its vertical diameter with an angular speed of 50 s^(-1) in a uniform horizontal magnetic field of magnitude 3 xx 10^(-2) T . Obtain the maximum and average e.m.f. induced in the coil . If the coil forms a closed loop of resistance 10 Omega , calculate the maximum value of current in the coil. Calculate the average power loss due to Joule heating. Where does this power come from ?

A circular coil of area 300 cm ^(2) and 25 turns rotates about its vertical diameter with an angular speed of 40 s ^(-1) in a uniform horizontal magnetic field of magnitude 0.05 T . Obtain the maximum voltage induced in the coil .

A circular coil of radius 6 cm and 20 turns rotates about its vertical diameter with an angular speed of 40"rad"s^(-1) in a uniform horizontal magnetic field of magnitude 2xx10^(-2)T . If the coil form a closed loop of resistance 8 Omega , then the average power loss due to joule heating is

The coil of an a.c. generator has 100 turns, each of cross sectional area 2 m^(2) . It is rotating at a constant angular speed of 30 radians // s, in a uniform magnetic field of 2 xx 10^(-2) T. What is the maximum power dissipated in the circuit, if the resistance of the circuit including that of the coil is 600 Omega ?