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Grade: 6
        
Two point charges + 8q and – q are located at x = 0 and x = L respectively. The location of a point on the x axis at which the net electric field due to these two point chages is zero is
 
(a) L/4
(b)  2L
(c) 4 L
(d) 8 L
4 years ago

Answers : (1)

Navjyot Kalra
askIITians Faculty
654 Points
							

(b) –K2q/(x-L)2 + K8q/x2 = 0 ? 1/ (x - L)2 = 4/ x2

or 1/x – L = 2/x ? x = 2 x – 2 L or x = 2 L

4 years ago
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