Electronics Engineering MCQs [Quiz 28]

Q1. One farad equals
A. 1 coulomb/volt
B. 1 newton/coulomb
C. 1 newton-meter
D. 1 volt/second/ampere

Q2. Which of the following is used by permanent magnets as the magnetic material?
A. iron
B. nickel
C. soft steel
D. hardened steel

Q3. Which of the following is used by temporary magnets as the magnetic material?
A. Hardened steel
B. Cobalt steel
C. Soft iron
D. Tungsten steel

Q4. What is the main advantage of temporary magnets?
A. The magnetic flux can be changed.
B. Hysteresis can be decreased.
C. Magnetic materials can be used.
D. Abundance of ferromagnetic material that can be temporarily magnetized.

Q5. Permanent magnets can be found in
A. electric bells
B. earphones
C. relays
D. dynamic loudspeakers

Q6. Temporary magnets are commonly employed in
A. electric instruments
B. motors
C. moving coils loudspeakers
D. magnetos

Q7. The force between two magnetic poles is                       their pole strengths.
A. directly proportional to
B. the sum of
C. inversely proportional to
D. the product of

Q8. If the distance between two magnetic poles decreases by 2 times, the force between them
A. decreases two times
B. increases four times
C. increases two times
D. decreases four times

Q9. The force between two magnetic poles                          is the relative permeability of the medium.
A. directly proportional to
B. independent of
C. inversely proportional to
D. equal to

Q10. Two similar poles, each 1Wb, placed 1 m apart in air will experience a repulsive force of
A. 63000 N
B. 63 × 10^-3 N
C. 8 × 10^12 N
D. 796 kN

Updated: 28th July 2019 — 1:46 PM

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