Which of the following works on torque on the current carrying conductor placed in magnetic field ?
A. galvanometer
B. ammeter
C. voltmeter
D. all of the above
Electromagnetic Induction
A.C cannot be used for________________?
A.C cannot be used for________________?
A. producing heat
B. producing light
C. magnetizing and electroplating
D. all the above
Which one of the following functions like a motor ?
Which one of the following functions like a motor ?
A. galvanometer
B. ammeter
C. voltmeter
D. all of above
An alternating current or voltage________________?
An alternating current or voltage________________?
A. fluctuates off and on
B. varies in magnitude alone
C. changes its direction again and again
D. changes its magnitude continuously and reverses its direction of flow after regularly recurring intervals.
emf induced in a circuit according to Faradays law depends on the_____________?
emf induced in a circuit according to Faradays law depends on the_____________?
A. maximum magnetic flux
B. rate of change of magnetic flux
C. change in magnetic flux
D. initial magnetic flux
Weber is the unit of_____________?
Weber is the unit of_____________?
A. Magnetic field intensity
B. magnetic induction
C. magnetic flux
D. self-inductance
A.C cannot be used for_______________?
A.C cannot be used for_______________?
A. producing heat
B. producing light
C. magnetizing and electroplating
D. all the above
A dynamo converts______________?
A dynamo converts______________?
A. mechanical energy into electrical energy
B. electrical energy into mechanical energy
C. magnetic energy into mechanical energy
D. magnetic energy into electrical energy
cmf generated by A.C dynamo depends upon_____________?
cmf generated by A.C dynamo depends upon_____________?
A. number of turns in the coil
B. magnetic field strength
C. frequency of rotation
D. all of above
Current produced by moving the loop of wire across a magnetic field is called_____________?
Current produced by moving the loop of wire across a magnetic field is called_____________?
A. A.C current
B. D.C current
C. induced current
D. mean square current