Easy Electrostatics Questions – Electrical Engineering (Page 3)

#41📜 EE Pre-Board March 2018📘 PowerhouseEasy

The voltage across a 50-μF capacitor rises at a constant rate of 10 V/ms. Calculate the current through the capacitor.

A2 mA

B5 mA

C50 mA

D500 mA

#42📜 EE Pre-Board March 2018📘 PowerhouseEasy

Two equally charged spheres repel each other with a force of 0.1kg. If their centers are 20 cm apart, find the charge on each.

A\(2.09 \times 10^{-6}\) C

B\(2.09 \times 10^{6}\) C

C\(2.00 \times 10^{-6}\) C

D\(2.00 \times 10^{6}\) C

#43📜 EE Pre-Board March 2018📘 PowerhouseEasy

The area of one plate of a two-plate mica capacitor is 0.0025 m² and the separation between plates is 0.02 m. If the dielectric constant of mica is 5, what is the capacitance of the capacitor?

A5.53 μF

B5.53 pF

C7.74 μF

D7.74 pF

#44📜 EE Pre-Board August 2018📘 PowerhouseEasy

A capacitor is charged with 10,000 μC. If the energy stored is 1 joule. Find the capacitance

A5μF

B50μF

C500μF

D5,000μF

#45📜 EE Pre-Board August 2018📘 PowerhouseEasy

Inside a hollow spherical conductor

Aelectric field is zero

Belectric field is constant

Celectric field changes with distance from the center of the sphere

Delectric field is unity

#46📘 EE Pocket Reviewer RojasEasy

The unit “ampere-second” is a unit of which of the following?

ACharge

BPower

CCurrent

DEnergy

#47📘 EE Pocket Reviewer RojasEasy

Which of the following parameters, will not affect the capacitance of the capacitor?

AThickness of the plates

BNature of dielectric

CArea of the plates

DDistance between the plates

#48📘 EE Pocket Reviewer RojasEasy

What is the SI unit of capacitance?

ACoulomb

BHenry

COhm

DFarad

#49📘 EE Pocket Reviewer RojasEasy

What is the reciprocal of capacitance?

ADaraf

BPermeance

CElastance

DSusceptance

#50📘 EE Pocket Reviewer RojasEasy

What is the power absorbed by a pure capacitor?

AMaximum

BMinimum

CNothing

DEither A or B, depending on voltage applied

#51📘 EE Pocket Reviewer RojasEasy

Let: D = electric flux density; E = electric field intensity. What is the formula to solve the absolute permittivity of the dielectric material?

ADE

BE/D

CD × E

DD/E

#52📘 EE Pocket Reviewer RojasEasy

Which one is equal to one farad?

ACoulomb per volt

BVolt per coulomb

CVolt per joule

DJoule per volt

#53📘 EE Pocket Reviewer RojasEasy

What happens to the field strength of an electric field if a dielectric is placed on the field?

ANothing

BIt will increase

CIt will decrease

DIt will become zero

#54📘 EE Pocket Reviewer RojasEasy

In making a capacitor, which property of a dielectric is best considered?

ALow permittivity

BHigh permittivity

CPermittivity equal to that of air

DPermittivity slightly higher than that of air

#55📘 EE Pocket Reviewer RojasEasy

Which of the following dielectric will make the lowest value of capacitance?

APaper

BMica

CCeramic

DAir

#56📘 EE Pocket Reviewer RojasEasy

Which one is stored in a capacitor?

AVoltage

BCharge

CCurrent

DPower

#57📘 EE Pocket Reviewer RojasEasy

Which is the main advantage of air as a dielectric ____ material for capacitors?

AIt has low loss

BIt is not physically dense

CIt has a high dielectric constant

DIt allows a large capacitance in a small volume

#58📘 EE Pocket Reviewer RojasEasy

Which of the following is often the source of static electricity?

APressure

BHeat

CMagnetism

DFriction

#59📘 EE Pocket Reviewer RojasEasy

As the spacing between plates in a capacitor is made smaller, all other things being equal ____

AThe capacitance increases

BThe capacitance decreases

CThe capacitance does not change

DThe resistance increases

#60📘 EE Pocket Reviewer RojasEasy

What happens to the current on a capacitor when the capacitor is being charged?

AIt will increase

BIt remains constant

CIt will decrease

DThe current is unpredictable

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