ISRO Technician-B Electrician Question Paper - 2019 (Set - 1) with Answer Key

ISRO Technician-B Electrician Question Paper - 2019 (Set - 1) with Answer Key

1) If capacitance of three capacitors are in the ratio 1:2:3 and the voltage across them are in the ratio 3:2:1, what is the ratio of energy stored in the capacitors?

Answer is:

9:8:3

Explanation:

.

2) Derivative of -sin x with respect to - cot x is

Answer is:

"-cot x"

3) Inter poles in DC machines are used to

Answer is:

Reduce the effect of armature reaction

4) Which motor is used for power factor improvement?

Answer is:

Over exited synchronous motor

5) Form factor is the ratio of

Answer is:

RMS value to average value