Two particles A and B having charges of 4 × 10 –6 C and –8 × 10 –6 C respectively, are held fixed at a separation of 60 cm. Locate the point(s) on the line AB where the electric potential is zero.
Text Solution
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(60 cm from A along BA and 20 cm from A along AB)
Sol.
At Pt. (1) : 
= 0 or 
∴ x 1 = 0.6 m to the left of A.
At pt (2): 
or 
∴ 0.6 – x 2 = 2x 2 or x 2 = 0.2 m to the right of A.
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