1. A transformer can operate from _______ d.c.
(A) Fixed
(B) Changing
(C) Positive
(D) Negative
2. A _______ can operate from changing dc.
(A) Transformer
(B) Opto-coupler
(C) Source
(D) Battery
3. An autotransformer has only _______ winding.
(A) Two
(B) One
(C) Three
(D) Any of above
4. An _______ transformer has only one winding.
(A) Step up
(B) Step down
(C) Tapped
(D) Auto
5. A transformer represents an example of __ inductance.
(A) Linear
(B) Non-linear
(C) Self
(D) Mutual
6. A ____ represents an example of mutual inductance.
(A) Transformer
(B) Capacitor
(C) Conductor
(D) Insulator
7. Thin sheets of silicon steel used for making transformer core are called:
(A) Laminations
(B) Coils
(C) Windings
(D) None
8. Unit of inductance is called _______.
(A) Farad
(B) Ohm
(C) Ampere
(D) Henry
9. Unit of _______ is called Henry.
(A) Capacitance
(B) Resistance
(C) Inductance
(D) Conductance
10. A transformer consists of _______ or more coils.
(A) Infinite
(B) Stepped
(C) Two
(D) Longitudinal
11. Transformer coils are _______ coupled.
(A) Electrically
(B) Vertically
(C) Horizontally
(D) Magnetically
12. A _______ transformer has more than 1 turn ratio.
(A) Step-up
(B) Step-down
(C) Auto
(D) Tapped
13. A _______ transformer has less than 1 turn ratio.
(A) Step-up
(B) Auto
(C) Step-down
(D) Tapped
14. A transformer cannot respond to _______ source.
(A) Constant voltage
(B) Professional
(C) DC voltage
(D) Resonance
15. _______ cannot be increased by transformer.
(A) Power
(B) Current
(C) Resistance
(D) Inductance
16. Power cannot be increased by _______.
(A) None of these
(B) Capacitor
(C) Inductor
(D) Transformer
17. Transformer working depends on _______.
(A) Any of these
(B) Magnetic flux
(C) Mutual inductance
(D) Self inductance
18. Working of _______ depends on mutual inductance.
(A) Capacitor
(B) Transformer
(C) Resistor
(D) All of these
19. Step-up transformer steps up _______.
(A) Capacitance
(B) Current
(C) Power
(D) Voltage
20. _______ transformer increases the level of voltage.
(A) Step down
(B) Auto
(C) Step up
(D) Power