Question

An object 'P' attracts 'Q' but repels 'R'. 'R' attracts 'S'. If 'S' is negatively charged, what kind of charge does 'Q' have?​

Answer 1

Answer:

Solution

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(a)Q and R will develop attractive forces because R is attracted by P whereas Q is repelled by P.

(b)Capacitance of a capacitor is defined as the ratio of the charge stored on any of the plates of capacitor to the potential between the plates.

V=Ed

since,

E

E

0

=K (where K is dielectric constant of slab)

V=

K

E

0

d

we know,E

0

=

ϵ

0

A

q

V=

ϵ

0

AK

qd

C=

V

q

=

d

Kϵ

0

A