Download the app

Questions  

The wavelength associated with a moving particle depends up on pth power of its mass m, qth power of its velocity v and rth power of Planck's constant h. Then the correct set of values of p, q and r is 

Remember concepts with our Masterclasses.

80k Users
60 mins Expert Faculty Ask Questions
a
p=1,q=−1,r=1
b
p=1,q=1,r=1
c
p=−1,q=−1,r=−1
d
p=−1,q=−1,r=1

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is D

Given λ=kmpvqhkThe dimensions of right-hand rule and left-hand side terms should be equal. So  M0LT0=[M]pLT−1qML2T−1r or  M0LT0=Mp+rLq+2rT−q−rNow, compare powers of M, L and T, we getp+r=0      ......(i)q+2r=1    .......(ii)−q−r=0    .......(iii)After solving p= -1, q = -1 and r=1 putting these values, we getλ=khmv which is the required relation.


Similar Questions

The length of cylinder is measured with a metre rod having least count 0.1 cm. Its diameter is measured with vernier callipers having least count 0.01 cm. Given that length is 5.0 cm and radius is 2.0 cm. The percentage error in the calculated value of the volume will be


whats app icon
phone icon