Electronics Engineering MCQs [Quiz 27]

Q1. Electric field intensity at a point is numerically equal to                    at that point.
A. potential gradient
B. potential difference
C. dielectric constant
D. the force

Q2. Three charges of +5 C, -6 C and +9 C are placed inside a sphere. What is the total flux passing through the surface of sphere?
A. 8 C
B. 14 C
C. 20 C
D. -6 C

Q3. The potential at a point due to a charge is 15 V. If the distance is increased three times, the potential at the point will be
A. 5 V
B. 18 V
C. 45 V
D. 15 V

Q4. Electric potential is a                  quantity.
A. scalar
B. phasor
C. vector
D. variable

Q5. The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium of relative permittivity of 3, then electric potential at that point will be
A. 63 V
B. 21 V
C. 7 V
D. 42 V

Q6. The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge of 5 C moves from A to B, then energy released as
A. 5 joules
B. 25 joules
C. 10 joules
D. 100 joules

Q7. What is the other name for dielectric strength?
A. Breakdown voltage
B. Electric intensity
C. Potential gradient
D. Dielectric constant

Q8. Which of the following materials has the highest dielectric strength?
A. Glass
B. Oiled paper
C. Mica
D. Air

Q9. What is used as the insulating material or dielectric in an electric ion?
A. Oiled paper
B. Mica
C. Paraffin
D. Titanate compound

Q10. What is used as the dielectric material in high voltage transformers?
A. Mica
B. Paraffin
C. Porcelain
D. Oiled paper

Updated: 26th July 2019 — 9:35 PM

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