The electric intensity in air at a point 20 cm from a point charge Q coulombs is 4.5 × 10^5 N/ C. The magnitude of Q is
The electric intensity in air at a point 20 cm from a point charge Q coulombs is 4.5 × 105 N/ C.
The magnitude of Q is
(A) 20 µC
(B) 200 µC
(C) 10 µC
(D) 2 µC
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