SSC JE Electrical 2018 with solution SET-1
Direct resistance Heating is used in

Salt-Bath furnace
All of these
Resistance Welding
Electrode Boiler

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SSC JE Electrical 2018 with solution SET-1
 The primary and secondary windings of an Auto-transformer are

Both magnetically and electrically coupled
Electrically coupled
None of these
Magnetically coupled

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SSC JE Electrical 2018 with solution SET-1
If the centrifugal switch does not open at 70 to 80 percent of a synchronous speed of the motor, it would result in

Overloading of running winding
Damage to the starting winding
None of these
Damage to the centrifugal switch

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SSC JE Electrical 2018 with solution SET-1
 Determine the magnitude of EMF (in V) induced between the axis of rotation and the rim of the disc, when the disc of radius 10 cm rotates with an angular velocity of 60 revolutions per second and placed in the magnetic field of 3 T acting parallel to the rotation of the disc

5.65
6.67
6.69
4.64

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SSC JE Electrical 2018 with solution SET-1
 For a dc machine shunt resistance and armature resistance values are

Low and High
Low and Low
High and Low
High and High

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SSC JE Electrical 2018 with solution SET-1
  What will be the equivalent capacitance (in mF) of three capacitors connected in a series having the capacitance of 0.04 mF, 0.08 mF, and 0.02 mF respectively?

0.032
0.065
0.011
0.026

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