Question

Electric charges are distributed in a small volume. The flux of the electric field through a spherical surface of radius 10 cm surrounding the total charge is 25 V-m. The flux over a concentric sphere of radius 20 cm will be –

• A. 25 V-m
• B. 50 V-m
• C. 100 V-m
• D. 200 V-m

Answer 1

Answer: (A)

25 V-m

Answer 2

$\phi _ { \mathrm { S } _ { 1 } }$= 25 V-m

$\phi _ { \mathrm { S } _ { 2 } }$= $\phi _ { \mathrm { S } _ { 1 } }$ = 25 V-m