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Electrostatics

Study 180 Electrical Engineering MCQs with correct answers and explanations.

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121Electrical EngineeringMedium

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

A200 pF

B150 pF

C100 pF

D50 pF

Correct answer

C. 100 pF

Explanation

The correct answer is 100 pF.

122Electrical EngineeringMedium

Electric field intensity is a quantity________?

Aboth A. and (6)

Bvector

Cnone of the above

Dscalar

Correct answer

B. vector

Explanation

The correct answer is vector.

123Electrical EngineeringMedium

Out of the following capacitors of identical rating which one will have the smallest dimensions ________?

ACeramic capacitor

BAluminium foil capacitor

CMica capacitor

DPaper capacitor

Correct answer

A. Ceramic capacitor

Explanation

The correct answer is Ceramic capacitor.

124Electrical EngineeringMedium

Potential difference is the work done in moving unit positive charge form one point to another________?

Aagainst electric intensity

Bin any direction

Cin the direction of electric intensity

Din the direction of electric flux

Correct answer

A. against electric intensity

Explanation

The correct answer is against electric intensity.

125Electrical EngineeringMedium

Electric intensity being a vector quantity always points________?

Aopposite to the direction of force experienced by a unit positive charge

Balong the direction of force experienced by a unit positive charge

Cperpendicular to the direction of force experienced by a uit positive charge

Dany of above

Correct answer

B. along the direction of force experienced by a unit positive charge

Explanation

The correct answer is along the direction of force experienced by a unit positive charge.

126Electrical EngineeringMedium

capacitors are used in transistor circuits?

ACeramic

BAir

CPaper

DElectrolytic

Correct answer

A. Ceramic

Explanation

The correct answer is Ceramic.

127Electrical EngineeringMedium

In order to remove static electricity from machinery________?

Ahumidify the surroundings

Binsulate the machinery

Cconstruct insulated cabins

Dground the framework

Correct answer

D. ground the framework

Explanation

The correct answer is ground the framework.

128Electrical EngineeringMedium

For which of the following parameter variation, the capacitance of the capacitor remains unaffected ________?

AArea of the plates

BDistance between plates

CNature of dielectric

DThickness of the plates

Correct answer

D. Thickness of the plates

Explanation

The correct answer is Thickness of the plates.

129Electrical EngineeringMedium

Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be________?

Apositively charged

Bpositively and negatively charged

Celectrically neutral

Dnegatively charged

Correct answer

C. electrically neutral

Explanation

The correct answer is electrically neutral.

130Electrical EngineeringMedium

Photocopier and inject printer are dealt in________?

ACapacitors

BCharges in motion

CElectric fields

DElectrostatics

Correct answer

D. Electrostatics

Explanation

The correct answer is Electrostatics.

Electric intensity being a vector quantity always points________?

Aopposite to the direction of force experienced by a unit positive charge

Balong the direction of force experienced by a unit positive charge

Cperpendicular to the direction of force experienced by a uit positive charge

Dany of above

Correct answer

B. along the direction of force experienced by a unit positive charge

Explanation

The correct answer is along the direction of force experienced by a unit positive charge.