**This contains Basic Electrical Engineering mcq questions for preparing SPPU exam 2020, for placements exams, companies exam and other.This containMCQ Electrostatics quetions. **

This is part 2 of Basic Electrical Engineering mcq questions with answers

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1.Which of the following statements is incorrect ?

- The leakage resistance of ceramic capacitors is generally high
- The stored energy in a capacitor decreases with reduction in value of capacitance
- The stored energy in a capacitor increases with applied voltage
- A wire cable has distributed capacitance between the conductors

Ans: b

- Which of the following capacitors has relatively shorter shelf life ?

- Mica capacitor
- Electrolytic capacitor
- Ceramic capacitor
- Paper capacitor

Ans: b

- The sparking between two electrical contacts can be reduced by inserting a

a capacitor in parallel with contacts

b capacitor in series with each contact

- resistance in line
- none of the above

Ans: a

- In the case of a lossy capacitor, its series equivalent resistance value will be

- small
- very small
- large
- zero

Ans: c

- The power dissipated in a pure capacitor is

(a) zero

(6) proportional to applied voltage

- proportional to value of capacitance
- both (b) and (c) above

Ans: a

- In a capacitive circuit

- a steady value of applied voltage causes discharge
- an increase in applied voltage makes a capacitor charge
- decrease in applied voltage makes a capacitor charge

- none of the above

Ans: b

- When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

- remain uncharged
- decrease
- increase
- become zero

Ans: b

- Capacitance increases with

- increase in plate area and decrease in distance between the plates
- increase in plate area and distance between the plates
- decrease in plate area and value of applied voltage
- reduction in plate area and distance between the plates

Ans: a

- A capacitor consists of

- two insulators separated by a con¬ductor
- two conductors separated by an in¬sulator
- two insulators only
- two conductors only

Ans: b

- A gang condenser is a

(a) polarised capacitor

(b) variable capacitor

- ceramic capacitor
- none of the above

Ans:c

- A paper capacitor is usually available in the form of

- tubes
- rolled foil
- disc
- meshed plates

Ans: b

- Air capacitors are generally available in the range

- 10 to 400 pF
- 1 to 20 pF
- 100 to 900 pF
- 20 to 100 pF

Ans: a

- The unit of capacitance is

- henry
- ohm
- farad
- farad/m

Ans: c

- A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be

(a) 10 F

(b) 10 uF

- 100 nF
- 1000 uF

Ans: b

- A capacitor in a circuit became hot and ultimately exploded due to wrong con¬nections, which type of capacitor it could be ?

- Paper capacitor
- Ceramic capacitor
- Electrolytic capacitor
- Any-of the above

Ans: c

- Energy stored in the electric field of a capacitor C when charged from a D.C source of voltage V is equal to joules

- CV2
- C2V
- CV2
- CV

Ans: a

- The absolute permittivity of free space is given by

a. 8.854 x 1(T9 F/m)

b. 8.854 x 1(T10 F/m

c. 8.854 x KT11 F/m

d. 8.854 x 10"12 F/m

Ans: b

- The relative permittivity of free space is given by

- 1
- 10
- c. 100
- d. 1000

Ans: a

- Electric field intensity is a quantity

- scalar

- vector
- both (a) and (6)
- none of the above

Ans: b

- When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of

- 2 joules
- 4 joules
- 6 joules
- 8 joules

Ans: d

- The capacitor preferred for high frequency circuits is

- air capacitor
- mica capacitor
- electrolytic capacitor
- none of the above

Ans: b

- The capacity of capacitor bank used in power factor correction is expressed in terms of

- kW
- kVA
- kVAR
- volts

Ans: c

- While testing a capacitor with ohm-metre, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is

- short-circuited
- open circuited
- alright
- leaky

Ans: d

- If a 6 (iF capacitor is charged to 200 V, the charge in coulombs will be

- 800 uC
- 900 uC
- 1200 uC
- 1600 uC

Ans: c

- Which capacitor will be physically smaller for the same ratings ?

- Ceramic capacitor
- Paper capacitor
- Both will be of equal size
- None of the above

Ans: a

- What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?

- 50 pF
- 100 pF
- 150 pF
- 200 pF

Ans: b

- A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?

- Ceramic capacitor
- Mica capacitor
- Both will have identical value of capacitance
- It depends on applied voltage

Ans: a

- Which of the following material has least value of dielectric constant ?

- Ceramics
- Oil
- Glass
- Paper

Ans: b

- Which of the following capacitors will have the least value of breakdown voltage ?

- Mica
- Paper
- Ceramic
- Electrolytic

Ans: d

- Dielectric constant for mica is nearly

a. 200

b. 100

- 3 to 8
- 1 to 2

Ans: c

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