Question

Select correct Statements :

a) Charge cannot be isolated

b) Repulsion is the sure test to know the presence of charge

c) Waxed paper is dielectric in paper capacitor

d) Variable capacitor is used in tuning circuits in radio

• A. a, b only
• B. a, c only
• C. a, b, c only
• D. b,c,d only

Answer 1

The correct option is D b,c,d only

Charges can be isolated.(Note magnetic monopoles cannot be isolated)
Attraction may happen due to induction of charges but repulsion is the sure test for presence of charge.
(c) and (d) are true facts which need to be remembered.