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Two spheres A and B are charged with the...

Two spheres A and B are charged with the charges of +10 and +20 coulomb respectively and separated by a distance of 80 cm. The electric field at point on the line joining the centres of the two spheres will be zero at a distance from the sphere A :

A

45 cm

B

33 cm

C

60 cm

D

20 cm

Text Solution

Verified by Experts

The correct Answer is:
B
`10/(4 p epsilon_(0)x^(2))=1/(4 pi epsilon_(0)) . (20xx1)/((0.8-x)^(2))`
`2x^(2)=(0.8-x)^(2)`
`1.414x=0.8-x,x=33cm`
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