SSC JE / State Electricity Boards JE Electrical Exams QUIZ-12

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Question 1

A 4-pole, 50 Hz single-phase induction motor is running with a slip of 3. 4%. The speed of the motor is

• A1279 r,p. m.
• B1120 r. p. m.
• C1449 r. p. m.
• D1540 r. p. m.

Question 2

A 4-pole d.c. machine has………….magnetic circuits.

• A2
• B8
• C4
• Dnone of the above

Question 3

Load factor of the curve shown in Fig. is

• A70%
• B80%
• C60%
• D50%

Question 4

Which among these fuse is very fast in operation?

• ASemiconductor fuses
• BHigh rupturing capacity type
• CCartridge type
• DKit Kat type

Question 5

Figure shows balanced delta-connected supply system. The current in line 1 is ………………..

• AI_R – I_B  Phasor difference
• BI_B – I_R  phasor difference
• CI_Y – I_R – I_B  Phasor difference
• Dnone of the above

Question 6

For transfer of maximum power in the circuit shown in Figure, the value of R_L should be ……………….

• A
• B
• C
• D

Question 7

For the emitter follower circuit shown in figure below, the approximate input impedance Z_in of the emitter follower is

• A20 kΩ
• B10 kΩ
• C5 kΩ
• D15 kΩ

Question 8

A portion of a conducting wire is bent in the form of a semicircle of radius as shown in Figure. At the centre of the semicircle, the magnetic field will be

• Azero
• Binfinite
• C
• D

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