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

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2. Expression for mmf in terms of field strength is

HI
H/I
HL
H/L

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3. is the property of magnetic which opposes the flow of flux through it.

Resistance
MMF
Reluctance
emf

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4. is the property of electrical conductor which oppose the flow of current through it

Reluctance
emf
mmf
Resistance

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5. Reluctance is expressed in

Ampere Weber
Ohm
Ampere/Weber
Volt/Ampere

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6. Reciprocal of reluctance is termed as

Conductance
Permenance
Permeability
None of these

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7. Ohm’s law for electric circuit will be

emf= current/resistance
emf= current X resistance
emf= resistance/current
emf= 1/( resistance X current)

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8. Ohm’s law for magnetic circuit will be

mmf= flux /resistance
flux= mmf X resistance
reluctance = mmf/ flux
Resistance= mmf X flux

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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

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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

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Electrical MCQ Question and Answer

Electrical MCQ Question and Answer

Electronics