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The electric field intensity in air at a...

The electric field intensity in air at a point 20 cm from a point charge Q coulombs is `4.5 xx10^(5) N//C`. The magnitude of Q is

A

0.1`mu`C

B

0.2 `mu`C

C

1 `mu`C

D

2`mu`C

Text Solution

Verified by Experts

The correct Answer is:
(d)
Electric Field intensity ,`E = 1/4pi epsilon_(0) Q/r^(2)`
`4.5 xx 10^(5) = 9 xx 10^(9)xxQ/(20 xx 10^(-2))^(2)`
`rArr Q = 2xx 10^(-6) = 2 mu C`
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