Basic Electrical Engineering Questions and Answers
Q1.
Which, among the following, have positive susceptibility?
Answer:
Both paramagnetic and ferromagnetic
Q2.
Materials having good retentivity are?
Answer:
Permanent magnets
Q3.
When an electric current flows into the page, what is the direction of the magnetic field?
Answer:
Clockwise
Q4.
When inductors are connected in series, the voltage across each inductor is _________
Answer:
Different
Q5.
Mutual inductance between two coupled coils depend on?
Answer:
Rate of change of flux linkage
Q6.
If the current in one coil becomes steady, the current in neighbouring coil is?
Answer:
Zero
Q7.
If the current in a coil having a constant inductance of L henrys grows at a uniform rate, what is the value of the average current?
Answer:
I/2
Q8.
Initially, when the switch in a series RL circuit is closed, the current in the inductor is?
Answer:
Zero
Q9.
What is the relation between the flux and the magnetizing current when a ferromagnetic core is introduced within the inductor?
Answer:
Not proportional
Q10.
When the coil is wrapped around a ferromagnetic core, why is it difficult to determine the inductance?
Answer:
The variation of flux is no longer proportional to the variation of current
0 Comments