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Electrostatics

Study 180 Electrical Engineering MCQs with correct answers and explanations.

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91Electrical EngineeringMedium

The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4 x 10 8C. If the spheres are connected by a copper wire________?

Ano flow of charge will occur

Bcharge will flow from A to B

Ccharge will flow from B to A

Dboth a and b are possible

Correct answer

B. charge will flow from A to B

Explanation

The correct answer is charge will flow from A to B.

92Electrical EngineeringMedium

When the dielectric is homogeneous,the potential gradient is________?

Anon-uniform

Bany of the above

Cuniform

Dzero

Correct answer

C. uniform

Explanation

The correct answer is uniform.

93Electrical EngineeringMedium

The electric charge of 100 °C is 13cm apart from another charge 16.9°C electric force between them is________?

A9x106N

B9x107N

C9x105N

D900N

Correct answer

D. 900N

Explanation

The correct answer is 900N.

94Electrical EngineeringMedium

Capacitance increases with________?

Aincrease in plate area and decrease in distance between the plates

Bdecrease in plate area and value of applied voltage

Cincrease in plate area and distance between the plates

Dreduction in plate area and distance between the plates

Correct answer

A. increase in plate area and decrease in distance between the plates

Explanation

The correct answer is increase in plate area and decrease in distance between the plates.

95Electrical EngineeringMedium

A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy________?

A100J

B1000J

C200J

D100 eV

Correct answer

A. 100J

Explanation

The correct answer is 100J.

96Electrical EngineeringMedium

Which of the following expression is correct for electric field strength________?

AE= nD2

BE = jtD

CE = D/E

DE = D2/t

Correct answer

C. E = D/E

Explanation

The correct answer is E = D/E.

97Electrical EngineeringMedium

If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because________?

Acharging current can flow

Bdischarge current can flow

Cvarying voltage produces the charging and discharging currents

Dof high peak value

Correct answer

C. varying voltage produces the charging and discharging currents

Explanation

The correct answer is varying voltage produces the charging and discharging currents.

98Electrical EngineeringMedium

A region around a stationary electric charge has________?

Aa magnetic field

Ban electric field

Cboth A. and (6)

Dnone of the above

Correct answer

B. an electric field

Explanation

The correct answer is an electric field.

99Electrical EngineeringMedium

Electric flux due to a point charge +q is________?

Aq/ɛ0

B4IIɛ0

C1/4IIɛ0. q/r2

D1/4IIɛ q/r

Correct answer

A. q/ɛ0

Explanation

The correct answer is q/ɛ0.

100Electrical EngineeringMedium

What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it________?

AIt will get punctured or cracked

BIt will become magnetic

CIts molecular structure will get changed

DIt will melt

Correct answer

A. It will get punctured or cracked

Explanation

The correct answer is It will get punctured or cracked.

Capacitance increases with________?

Aincrease in plate area and decrease in distance between the plates

Bdecrease in plate area and value of applied voltage

Cincrease in plate area and distance between the plates

Dreduction in plate area and distance between the plates

Correct answer

A. increase in plate area and decrease in distance between the plates

Explanation

The correct answer is increase in plate area and decrease in distance between the plates.

If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because________?

Acharging current can flow

Bdischarge current can flow

Cvarying voltage produces the charging and discharging currents

Dof high peak value

Correct answer

C. varying voltage produces the charging and discharging currents

Explanation

The correct answer is varying voltage produces the charging and discharging currents.