A. carbon brushes
B. coil
C. commutator
D. magnetic field
Related Mcqs:
- The polarity of the induced voltage can be determined by using the left-hand generator rule
A. Yes
B. No - For a motor-generator set which of the following motors will be preferred ?
A. Synchronous motor
B. Slip ring induction motor
C. Pole changing induction motor
D. Squirrel cage induction motor - The phase difference between the output and input voltages of a CE amplifier is _____________?
A. 180o
B. 0o
C. 90o
D. 270o - In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _________________?
A. 180o
B. 270o
C. 90o
D. 0o - The capacity of a crane is expressed in terms of_______________?
A. type of drive
B. span
C. tonnes
D. any of the above - Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?
A. decrease
B. increase
C. remain constant
D. depends upon composition of dielectric - If the distance between the two point charges become half then force between them becomes______________?
A. double
B. half
C. four times
D. remains same - capacitor is to have an energy content of 20J it must be placed across a potential difference of________________?
A. 4 volts
B. 9 volts
C. 2 volts
D. 1 vol - A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy_______________?
A. 200J
B. 100J
C. 1000J
D. 100 eV - Potential difference is the work done in moving unit positive charge form one point to another________________?
A. in the direction of electric intensity
B. against electric intensity
C. in any direction
D. in the direction of electric flux
