Basic Electrical Engineering Questions and Answers
Q1.
What is emf?
Answer:
Voltage
Q2.
According to Faraday’s laws of electromagnetic induction, an emf is induced in a conductor whenever?
Answer:
Cuts magnetic lines of flux
Q3.
The relation between the direction of induced emf and the direction of magnetic flux is _______
Answer:
Perpendicular
Q4.
What is the principle of the transformer?
Answer:
Electromagnetic induction
Q5.
Why is the coil of a ballistic galvanometer wound on a non- metallic former?
Answer:
To minimise damping when high resistance is connected in series
Q6.
B/H curve shows the relationship between?
Answer:
Magnetic field strength and magnetic flux density
Q7.
The equivalent of the current I in magnetic ohm’s law is?
Answer:
Flux
Q8.
When the area of cross section of the material increases, what happens to reluctance?
Answer:
Decreases
Q9.
What is the unit for relative permeability?
Answer:
No unit
Q10.
As the temperature increases up to the Curie temperature, the relative susceptibility of ferromagnetic materials?
Answer:
Increases
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