A. galvanometer
B. ammeter
C. voltmeter
D. all of the above
Related Mcqs:
- An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called_____________?
A. Induced current
B. Eddy current
C. Back emf
D. None of the above - A conductor carries 125 amperes of current under 60° to a magnetic field of 1.1 tesla. The force on the conductor will be nearly______________?
A. 50 N
B. 120 N
C. 240 N
D. 480 N - Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla
A. 100 N
B. 400 N
C. 600 N
D. 1000 N - A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be____________?
A. 10 V
B. 15 V
C. 25V
D. 50V - Lagging of changes in the magnetization of a substance behind changes in the magnetic field as the magnetic field is varied is known as magnetic_____________?
A. Retaintivity
B. Permeability
C. Flux
D. Hysteresis - The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?
A. Magnetic flux density
B. Torque
C. Mutual induction
D. Motional emf - _______________has the least value of starting torque to full load torque ratio?
A. D.C. shunt motor
B. D.C. series motor
C. Squirrel cage induction motor
D. Slip ring induction motor - The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be
A. R Ω
B. 2R Ω
C. 4R Ω
D. 8R Ω - 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 - Reversing the field or the current will reverse the force on the conductor
A. Yes
B. No
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