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A ring made of wire with radius of 10 cm is charged negatively and carries a chage of -5x10^(-9)C. the distance from the centre to the point on the axis of the ring where the intensity of the electric field is maximum is a)0.71m b) 7.1 x 10^-2m c) 7.1 x 10^-3m d) 1.7x 10^-2m the answer is d but what value do we put for electric field being max?

A ring made of wire with radius of 10 cm is charged negatively and carries a chage of -5x10^(-9)C. the distance from the centre to the point on the axis of the ring where the intensity of the electric field is maximum is 


a)0.71m


b) 7.1 x 10^-2m


c) 7.1 x 10^-3m


d) 1.7x 10^-2m


the answer is d but what value do we put for electric field being max?

Grade:12th Pass

1 Answers

ayush jain
15 Points
9 years ago

u can write electric field at a distance x from center of ring... , y components will get cancelled and x components will add up

now we get the expression in terms of x , differentiate it wrt. x and equate to zero

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