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WorksheetsTRANSFORMER
Total questions: 10
Worksheet time: 5mins
An Inductor works as a ___________ circuit for DC supply.
Open
Short
Polar
Non-polar
The electrical energy consumed by a coil is stored in the form of:
an electrical field
a force field
an electrostatic field
a magnetic field
Mutual inductance between two magnetically coupled coils depends on
Permeability of the core material
Number of turns of the coils
Cross sectional area of their common core
All of the above
Which of the following is unit of inductance?
Ohm
Henry
Ampere turns
Webers/meter
If in an iron cored coil the iron core is removed so as to make the air cored coil, the inductance of the coil will be
More
Less
The same
None of these
Which of the following circuit elements will oppose the change in circuit current?
Capacitance
Inductance
Resistance
All of the above
If supply frequency of a transformer increases, the secondary output voltage of the transformer
Increase
Decrease
Remain the same
Any of the above
Lamination of transformer core is made of
Cast Iron
Silicon Steel
Aluminium
Cast Steel
Transformer core are laminated in order to
reduce hysteresis loss
reduce hysteresis & eddy current loss
minimize eddy current loss
Copper loss
Which of the following does not change in an ordinary transformer........
.Frequency
.Voltage
.Current
Any of the above
