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

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Amit Saxena Grade: upto college level
        Suppose an attractive nuclear force acts between two protons which may be written as F = Ce-kr/r2. (a) Write down the dimensional formulae and appropriate SI units of C and k. (b) Suppose that k = 1 fermi-1 and that the repulsive electric force between the protons is just balanced by the attractive nuclear force when the separation is 5 fermi. Find the value of C.
3 years ago

Answers : (3)

Navjyot Kalra
askIITians Faculty
654 Points
										Sol. Expression of electrical force F = C * e^-kr/r^2

Since e^-kr is a pure number. So, dimecsional formulae of F = dim ensional formulae of C/dim ensional formulae of r^2
Or, [MLT^–2][L^2] = dimensional formulae of C = [ML^3T^–2]
Unit of C = unit of force × unit of r^2 = Newton × m^2 = Newton–m^2
Since –kr is a number hence dimensional formulae of
K = 1/dim entional formulae of r = [L^-1] Unit of k = m^-1
3 years ago
12 Points
										Already in peat b given k=1Fermi-1so k is simply per meter *and since e is purely a number equate c to f*rsquare
3 months ago
12 Points
										For part b)equate F=kq1q2/r*2 to F=C/e*kr.r*2 then r*2 on both sides cancelled put value of e as 2.7 power 5 u will get the answer as 3.3*10power -26
3 months ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: Rs. 15,900
  • View Details
  • Electricity and Magnetism
  • OFFERED PRICE: Rs. 1,696
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

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