Electrical MCQ Questions and Answers
Electrical MCQ
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17 questions
1. Find the total resistance when 2 Ohm and 4 Ohm resistances are in parallel.
- 1.33 Ohms
- 0.33 Ohms
- 2.33 Ohms
- 1 Ohm
3. is the property of magnetic which opposes the flow of flux through it.
- Resistance
- MMF
- Reluctance
- emf
4. is the property of electrical conductor which oppose the flow of current through it
- Reluctance
- emf
- mmf
- Resistance
6. Reciprocal of reluctance is termed as
- Conductance
- Permenance
- Permeability
- None of these
7. Ohm’s law for electric circuit will be
- emf= current/resistance
- emf= current X resistance
- emf= resistance/current
- emf= 1/( resistance X current)
8. Ohm’s law for magnetic circuit will be
- mmf= flux /resistance
- flux= mmf X resistance
- reluctance = mmf/ flux
- Resistance= mmf X flux
9. The chart given below indicates four different conditions under which an Induction motor may be called upon to operate, with a constant shaft load.
Applied Rotor voltage Frequency Resistance
1. Normal Normal Normal
2. 80% Normal Normal
3. 80% 80% Normal
4. Normal Normal 80%
The operating conditions which lead to increasing values of running slips will be In the sequence
- 1,4,3,2
- 1,4,2,3
- 4,1,3,2
- 4,1,2,3
10. Consider the following statements about the operation of a three-phase induction motor running at full load:
If one of the supply line fuse blows off, the motor will
1. Stall
2. Continue to run with increased slip,
3. continue to run with normal supply current
4. continue to run with excessive supply current
Of these statements
- 1 alone is correct
- 3 alone is correct
- 2 and 3 are correct
- 2 and 4 are correct