Download Important MCQ questions about Capacitor. and more Quizzes Basic Electronics in PDF only on Docsity!
Capacitor is a device used to__________ A.store electrical energy B.vary the resistance C.store magnetic energy D.dissipate energy ANSWER:A Capacitor stores which type of energy A.kinetic energy B.vibrational energy C.potential energy D.heat energy ANSWER:C Capacitor blocks__________ after long time A alternating current B.direct current C.both alternating and direct current D.neither alternating nor direct current ANSWER:B Why does capacitor block dc signal at steady state A.due to high frequency of dc signal B.due to zero frequency of dc signal
C.capacitor does not pass any current at steady state D.due to zero frequency of dc signal ANSWER:D If a parallel plate capacitor of plate area 2m2 and plate separation 1m store the charge of 1.77x10-11 C. What is the voltage across the capacitor A.1V B.2V C.3V D.4V ANSWER:A Which of the following is a passive device A.Transistor B.Rectifier C.capacitor D.Vaccuum Tubes ANSWER:C What is the value of capacitance of a capacitor which has a voltage of 4V and has 16C of charge A.2F B.4F C.6F D.8F ANSWER:B
D. 10-4 F
ANSWER:C
The capacitance is a circuit component that oppose the change in circuit A. Current B. Voltage C. Impedance D. None of the above ANSWER:B The ohmmeter reading for a short circuited capacitor is A. Infinity B. Few kilo ohms C. Few megaohms D. Zero ANSWER:D Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them A. All in series B. All in parallel C. Two in parallel and third in the series with this combination D. Two in series and third in parallel across this combination ANSWER:C If 10 μF capacitors are connected in parallel the, net capacitance is
A. 20 μF B. 30 μF C. 50 μF D. 40 μF ANSWER:B If 15 μF capacitors are connected in series, the net capacitance is A. 5 μF B. 30 μF C. 45 μF D. 50 μF ANSWER:A Which of the following capacitors will have the least variation A. Paper capacitor B. Ceramic capacitor C. Silver plated mica capacitor D. None of the above ANSWER:C Which of the following capacitors has relatively shorter shelf life A. Mica capacitor B. Electrolytic capacitor C. Ceramic capacitor D. Paper capacitor
B. Insulators separated by a dielectric C. Silver coated insulators D. Conductors separated by an insulator ANSWER:D What is that property of a capacitor which delays any change of voltage across it A. Inductance B. Capacitance C. Potential gradient D. None of the above ANSWER:B The electric field intensity is inversely proportional to A.radius B.charge C.diameter D.none ANSWER:A The electric flux density is proportional to A.q/A B.I/A C.V/A D.Q ANSWER:A
Electric field intensity is directly proportional to A.electric flux density B.magnetic flux C.electric flux D.all ANSWER:A Capacitance of single phase line C is A.1/2Cn B.2Cn C.Cn D.3Cn ANSWER:A Capacitance of 3 phase line is inversely proportional to A.ln D/r B.In r/D C.ln r D.ln D ANSWER:A The permitivity is given by A.Phi/E B.D/E
