EE MCQ

SSC JE Electrical 2019 with solution SET-2
######
Both the main winding and auxiliary winding of a single-phase induction motor is placed on the ______?

A single-phase induction motor with only one winding on the stator cannot produce any starting torque. Hence, some extra arrangement is required to start the motor. In the running condition, the motor is capable of developing the torque with only one winding on the stator.

The simplest method of starting is to provide an auxiliary winding on the stator in addition to the main winding. The two windings are placed in the stator with their axes displaced by 90 electrical degrees in space.

Related Question

SSC JE Electrical 2019 with solution SET-2
######
Which of the following is an important feature of a 3-phase synchronous motor?

Synchronous motors are not self-starting. The DC source is applied to the rotor of the synchronous Motor.

SSC JE Electrical 2019 with solution SET-2
######
The 2’s complement of 1010101 is

The 2’s complement of the number (1010101)2 is found in two steps. First, convert the given number into its l’s complement.

1’s complement of a binary number is just an inversion of individual bits.

1’s complement of (1010101)2 is (0101010)2

To find 2’s complement of the number add one to the least significant bit (LSB). So

SSC JE Electrical 2019 with solution SET-2
######
Observe the given network and answer the question? The potential at point a = ?

For the given network the potential at point a can be found by applying KVL.

For loop 1

Va = E1 − I1R1

Va = I3R3

For loop 2

Va = E2 − I2R2

SSC JE Electrical 2019 with solution SET-2
######
1 kcal is approximately equal to

1 kcal = 4200 J

Watt = Joule/S

joule = watt/sec

4200 joule = 4200 watt-sec