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
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 . Its diameter is measured with vernier callipers having least count . Given that length is and radius is . The percentage error in the calculated value of the volume will be
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