The de-Broglie wavelength of a particle with mass 19 and velocity 100 m/s is __________

(a)

6.63 \(\times\) 10^-35 m

(b)

6.63 \(\times\) 10^-34 m

(c)

6.63 \(\times\) 10^-33 m

(d)

6.65 \(\times\) 10^-35 m

Which of the following is not among short comings of Bohr's model?

(a)

Bohr theory could not account for the fine lines in the atomic spectrum

(b)

Bohr theory was unable to account for the splitting of the spectral lines in the presence of magnetic field

(c)

No explanation for using the principle of quantisation of angular momentum

(d)

It did not give information about energy level

What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10ms^-1?

(a)

6.62 \(\times\) 10^-34m

(b)

6.626 \(\times\) 10³⁴m

(c)

6.626 \(\times\) 10^-34m

(d)

6.626 \(\times\) 10³⁴m

The de-Broglie wavelength associated with a matter particle is ______________

(a)

Directly proportional to die momentum of the particle

(b)

Directly proportional to the velocity of the particle

(c)

Inversely proportional to the momentum of the particle

(d)

Inversely proportional to Plank's constant

The wavelength associated with an electron moving with velocity 10¹⁰ ms^-1 is ___________

(a)

6.62 \(\times\) 10^-10 m

(b)

7.28  \(\times\) 10^-14 m

(c)

3.69 \(\times\) 10^-12 m

(d)

4.92 \(\times\) 10^-11 m