Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

hello mam, A charge Q is divided into two parts of qand Q-q if the coulomb repulsion between them when they are seprated is to be maximum the ratio of Q/q should be ? in this answer its given that for maximum forcedF/dq=0.. may i know how this is taken?

hello mam, A charge Q is divided into two parts of qand Q-q if the coulomb repulsion between them when they are seprated is to be maximum the ratio of Q/q should be
? in this answer its given that for maximum forcedF/dq=0.. may i know how this is taken?

Grade:12

1 Answers

Beenu Mathew
533 Points
4 years ago
Given a separation r, the force is 

F = k q (Q-q) / r2

This is maximum when q (Q-q) has a maximum. 

The quadratic -q2 + q Q has a maximum where q = -Q/(-2), so when q/Q = ½ or Q/q=2
 
 

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free