A. Maximum
B. Minimum
C. Zero
D. A finite value
✅ The correct answer is option C.
Electrical Engineering MCQs
If a D.C. motor is connected across the A.C. supply it will_______________?
A. run at normal speed
B. not run
C. run at lower speed
D. burn due to heat produced in the field winding by .eddy currents
✅ The correct answer is option D.
In a cable the voltage stress is maximum at____________?
A. sheath
B. insulator
E. surface of the conductor
D. core of the conductor
✅ The correct answer is option D.
Dielectric strength of rubber is around____________?
A. 5 kV/mm
B. 15 kV/mm
C. 30 kV/mm
D. 200 kV/mm
✅ The correct answer is option C.
With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals_____________?
A. 10 W
B. 20 W
C. 40 W
D. 60 W
✅ The correct answer is option D.
An induction motor can run at synchronous speed when____________?
A. it is run on load
B. it is run in reverse direction
C. it is run on voltage higher than the rated voltage
D. e.m.f. is injected in the rotor circuit
✅ The correct answer is option D.
When SCR starts conducting, then _____________ loses all control?
A. Gate
B. Cathode
C. Anode
D. None of the above
✅ The correct answer is option A.
An SCR can exercise control over____________of a.c. supply?
A. Positive half-cycles only
B. Negative half-cycles only
C. Both positive and negative half-cycles
D. Positive or negative half-cycles
✅ The correct answer is option D.
An SCR is made of_______________?
A. Germanium
B. Silicon
C. Carbon
D. None of the above
✅ The correct answer is option B.
In a commutator_____________?
A. copper is harder than mica
B. mica and copper are equally hard
C. mica is harder than copper
D. none of the above
✅ The correct answer is option C.