SSC JE Electrical 2019 with solution SET-1
 Which of the following is the correct relation regarding coupled coils?

M ≤ (L1L2)0.5
M = (L1 + L2)/2
M = (L1 − L2)/2
M > (L1L2)0.5

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SSC JE Electrical 2019 with solution SET-1
 Identify the INCORRECT statement with regards to synchronous motors

It is a constant speed motor
The armature winding is placed on the stator
The field winding is placed on the rotor
It is a self-starting machine

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SSC JE Electrical 2019 with solution SET-1
 The resistive component of the rotor with resistance R2 offered to the backward rotating flux wave in a single-phase motor runs with slip s is given as

R2 ⁄ S
R2 ⁄ (2 − S)
R2 ⁄ (1 − S)
R2 ⁄ (1 + S)

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SSC JE Electrical 2019 with solution SET-1
 The Norton’s current in the circuit shown below is

4A
12A
2A
120A

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