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
Menu
Shivam Bhagat Grade: 9
        in the formula, V= kq/r, what is k, q and r . Pls explain where and why is this formula usd and show the derivation too!!!!!! Pls!!!!!
6 years ago

Answers : (2)

vikas askiitian expert
510 Points
										

V = potential at any point ...


V = kq/r 


another definition =>  workdone in bringing +ve test charge(q=1)  from infinity to a point which is at a distance r , near a charge q ...


F = k(q)(qo)/r2                      (from culambs law)


qo is +ve test charge , F is force bw test charge & q charge...


F = -dU/dr


dU/dr = -F = -kqqo/r2


dU = -kqqo(1/r2)dr             lim from infinity to r


U = -kqqo(-1/r)                 lim infinity to r                     [   (1/r2)dr = -1/r     ]


U = kqqo/r                  (qo = 1)


so , U = kq/r


here K is columbs constant , k = 9*109units , q is charge ...


this is the required result...

6 years ago
vikas askiitian expert
510 Points
										

approve if u like my ans

6 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete Physics Course - Class 12
  • OFFERED PRICE: Rs. 2,756
  • View Details
Get extra Rs. 551 off
USE CODE: CART20
  • Complete Physics Course - Class 11
  • OFFERED PRICE: Rs. 2,968
  • View Details
Get extra Rs. 594 off
USE CODE: CART20

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details