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.Management Sciences
Category: Electrostatics
Which of the following capacitors has relatively shorter shelf life____________?
A. Mica capacitor
B. Electrolytic capacitor
C. Ceramic capacitor
D. Paper capacitor
A capacitor is a perfect insulator for______________?
A. direct current
B. alternating current
C. both for the direct and alternating current
D. none of above
A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be_________________?
A. 900 volts
B. 9000 volts
C. 90 volts
D. zero
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 series with this combination
D. two in series and third in parallel across this combination
The value of E within the field due to a point charge can be found with the help of___________?
A. Faraday’s laws
B. Kirchhoff s laws
C. Coulomb’s laws
D. none of the above
The value of the capacitance depends upon the________________?
A. voltage applied
B. thickness of the capacitor plates
C. geometry of the capacitor
D. dinsity of the capacitor plates
The number of electrons in one coulomb charge is equal to_______________?
A. 6.2 x 1018
B. 1.6 x 1019
C. 6.2 x 1021
D. 1.6 x 10-27
select the only wrong statement?
A. similar charges repel each other
B. dissimilar charges attract each other
C. repulsion is the sure test of electrification
D. an electrically neutral body is repelled both positively and negatively charged bodies
The direction of electric field due +0 positive charge is ___________?
A. away from the charge
B. towards the charge
C. both A. and (6)
D. none of the above
The total deficiency or excess of electrons in a body is known as____________?
A. current
B. voltage
C. potential gradient
D. charge
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