Problem

Problem

Charges

Q_1

and

Q_2

lie inside and outside respectively of a closed surface

S

. Let

E

be the field at any point on

S

and

\phi

be the flux of

E

over

S

. (a) If

Q_1

changes, both

E

and

\phi

will change (b) If

Q_2

changes,

E

will change but

\phi

will not change (c) If

Q_1 = 0

and

Q_2 \neq 0

, then

E \neq 0

but

\phi = 0

(d) If

Q_1 \neq 0

and

Q_2 = 0

, then

E = 0

but

\phi \neq 0

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