Electrical Engineering · Question Bank

Electrostatics

69 of 100 questions match · page 4 of 4. Answer in your head first, then check the solution.

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#61📘 EE Pocket Reviewer RojasEasy

A gang condenser used in a radio is what type of capacitors?

AAir capacitor

BPaper capacitor

CCeramic capacitor

DElectrolytic capacitor

#62📘 EE Pocket Reviewer RojasEasy

When capacitors are connected in series, the total capacitance is

AGreater than the largest capacitance

BSmaller than the smallest capacitance

CSmaller than the largest capacitance but greater than the smallest capacitance

DGreater than the smallest capacitance but smaller than the largest capacitance

#63📘 EE Pocket Reviewer RojasEasy

What do you mean by a variable capacitor?

AIts capacitance changes with temperature

BIts capacitance can be changed by changing its dielectric

CIts capacitance can be changed by mechanical means

DIts capacitance changes when voltage is changed

#64📘 EE Pocket Reviewer RojasEasy

Let: C = capacitance, V = voltage and Q = charge. Which of the following formulas is used to solve the energy stored in the capacitor?

ACV

B\(C^2V\)

C2QV

D\(\tfrac{1}{2}CV^2\)

#65📘 EE Pocket Reviewer RojasEasy

Which of the following types of capacitors is marked for polarity?

ACeramic

BPaper

CMylar

DElectrolytic

#66📘 EE Pocket Reviewer RojasEasy

Which of the following types of by-pass capacitors work well at high frequency?

AElectrolytic

BMica

CCeramic

DPaper

#67📘 EE Pocket Reviewer RojasEasy

To test a capacitor which is suspected to be shorted, it is connected in series with a 24 V test lamp and the series combination is connected across a 24 V dc source. If the capacitor is really shorted what happens to the lamp?

AIt will not light

BIt will light normally

CIt will light on and off

DIt will light but a little bit darker

#68📘 EE Pocket Reviewer RojasEasy

A capacitor is an electrical device consisting of two parallel

AInsulators

BDielectrics

CConductors

DSemi-conductors

#69📘 EE Pocket Reviewer RojasEasy

Which one is considered the disadvantage of using the electrolytic type capacitors?

AIt has low insulation resistance and applicable only to dc circuits

BIt has high insulation resistance and applicable only to ac circuits

CIt has high capacitance and low insulation resistance

DIt has high capacitance and high insulation resistance

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