Home
Class 12
PHYSICS
Derive the expression for the instantan...

Derive the expression for the instantaneous value of the emf induced in the coil.

Text Solution

AI Generated Solution

To derive the expression for the instantaneous value of the electromotive force (emf) induced in a coil rotating in a uniform magnetic field, we can follow these steps: ### Step 1: Define the Variables Let: - \( N \) = number of turns in the coil - \( B \) = magnetic field strength (in teslas) - \( A \) = area of the coil (in square meters) - \( \theta \) = angle between the magnetic field and the normal to the plane of the coil ...
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SET-II DELHI BOARD (SEC-B)|2 Videos

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SET-II DELHI BOARD (SEC-C)|4 Videos

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SET-I (SECTION-D)|1 Videos

  • SAMPLE PAPER 2019

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION D|6 Videos

Similar Questions

Explore conceptually related problems

A horizontal straight wire of length L extending from east to west is falling with speed v at right angles to the horizontal component of Earth.s magnetic field B. (i) Write the expression for the instantaneous value of the emf induced in the wire. (ii) What is the direction of the emf? (iii) Which end of the wire is at the higher potential?

Describe briefly, with the help of a labell diagram, the basic elements of an A.C. generator. State its underlying principle. Show diagrammatically how an alternating emf is generated by a loop of wire rotating in a magnetic field. Write the expression for the instantaneous value of emf induced in the rotating loop.

(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.

Obtain an expression for the instantaneous value of the induced emf in an ac generator.

(a) Draw a labelled diagrame of an ac generator. Obtain the expression for the emf induced in the rotating coil of N turns each of cross-sectional are A, in the presence of a magnetic field overset(to) (B) . (b) A horizonatal conducting rod 10m long extending from east to west is falling with a speed 5.0 ms ^(-1) at right angles to the horizontal component of the Earth's magnetic fields. 0.3 xx 10^(-4) Wb m^(-2) . Find the instantaneous value of the emf induced in the rod .

A magnent moves towards a coil. Which of the factors can affect the emf induced in the coil?

The magnetic flux (phi) linked with the coil depends on time t as phi=at^(n) , where a and n are constants. The emf induced in the coil is e

The current in a coil changes from 3.50 A to 2.00 A in the same direction in 0.500s. If the average emf induced in the coil is 12.0mV. What is the inductance of the coil?

A rectangular coil rotates about an axis normal to the magnetic field, If E_(m) is the maximum value of the induced emf, then the instantaneous emf when plane of the coil makes an angle of 45^(@) with the magnetic field is

A coil of 800 turns and 50 cm^(2) area makes 10 rps about an axis in its own plane in a magnetic field of 100 gauss perpendicular to this axis. What is the instantaneous induced emf in the coil?

Home
Profile