Question

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Answer 1

Class 12>>Physics>>Electric Charges and Fields>>Electric Field and Electric Field Lines>>Two charges 2mu C and 1mu C are placed a

Question

Two charges 2μC and 1μC are placed at a distance of 10cm. The distance of third charge from one of the charges so that it does not experience any force is:

A

4.14cm from 2μC

B

5.858 cm from 2μC

C

3.52 cm from 2μC

D

6.48 cm from 2μC

Medium

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Solution

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Correct option is B)

Let the charge is placed at distance x from 2μc

Now the net force acting on charge q should be zero.

⇒ (10−x)2k(1×10−6)q=x2(2×10−6)q

⇒10−x1=x2

⇒x=102−x2

⇒x(1+2)=102

⇒x=1+2102

⇒