Constant Current, Audio Frequency & Pulse Transformers - MCQs with Answers

Constant Current, Audio Frequency & Pulse Transformers - MCQs with Answers

Q1. In the operation of constant current transformer, two magnetic fields are produced. The magnetic field produced in the secondary is

a. In the same direction of magnetic field produced in the primary
b. In the opposite direction of magnetic field produced in the primary
c. Perpendicular to the direction of magnetic field produced in the primary
d. Both b and c

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Q2. The constant current transformer are mainly used for

a. Supplying series connected street light
b. Personal computers
c. Arc welding
d. Electric toys

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Q3. The high leakage impedance transformers are suitable for the applications of

a. Arc welding
b. Personal computers
c. Street lights
d. Electric lamp

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Q4. Small iron core transformers used in certain frequency range is also called audio frequency transformer. The audio frequency range is

a. 20 t0 2000 Hz
b. 20 to 20000 Hz
c. 2 to 2000 Hz
d. 200 to 20000 Hz

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Q5. Pulse transformers are small in size. The leakage inductance and permeability of alloy used is

a. Low, high
b. Low, low
c. High, low
d. High, high

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