Electrostatics(Engineering > Electrical Engineering ) Questions and Answers
Question 1. Which medium has the least dielectric strength ?
Paraffin wax
Quartz
Glass
Air
Explanation:-
Answer: Option D. -> Air
Question 2. The minimum value of potential gradient in a cable occurs in
insulation
conductor
outer sheath
uniformly all over
Explanation:-
Answer: Option A. -> insulation
Question 3. Dielectric strength ______ with increasing thickness
increases
decreases
remains unaltered
none of the above
Explanation:-
Answer: Option B. -> decreases
Question 4. If a third equal and similar charge is placed between two equal and similar charges, then this third charge will
move out of the field of influence of the two charges
remain in stable equilibrium
not be in equilibrium
be in unstable equilibrium
Explanation:-
Answer: Option B. -> remain in stable equilibrium
Question 5. Capacitors are mainly used for radio frequency tuning.
Paper
Air
Mica
Electrolytic
Explanation:-
Answer: Option B. -> Air
Question 6. The unit of capacitance is
henry
ohm
farad
farad/m
Explanation:-
Answer: Option C. -> farad
Question 7. The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value,
37
42
63
73
Explanation:-
Answer: Option A. -> 37
Question 8. A capacitor consists of two
Ceramic plates and one mica disc
Insulators separated by a dielectric
Silver-coated insulators
Conductors separated by an insulator
Explanation:-
Answer: Option D. -> Conductors separated by an insulator
Question 9. An electrolytic capacitor can be used for
D.C. only
AC. only
both D.C. as well as A.C.
none of the above
Explanation:-
Answer: Option A. -> D.C. only
Question 10. A paper capacitor is usually available in the form of
