Question

The wavelength  of de Broglie waves associated with an electron (massm, charger e) accelerated through a potential difference of V is given by (his Planck’s constant)  

Solution

Correct option is

  

Therefore, 

                              

                                    

                                       .

SIMILAR QUESTIONS

Q1

A radioactive nucleus is leing produed at a constant rate  per second. Its decay constant is λ. If No. are the number of nuclei at time t = 0, then  themanimum no, of nuclei

Q2

A radioactive sulestance has a half–life of four months three fourth of thesulestance will decay in

Q3

Half life of radium is 1600 yrs. Its average life is

Q4

What percentage of original radioactive atoms is left after four half lives

Q5

No atoms of radioactive element emit N2 beta particles per second. The decay constant of element in sec–1 is

Q6

A radioactive element has half life period 800 yrs. After 6400 yrs what amount will remain

Q7

A nucleus  emits one alpha particle and two β-particle The resulting nucleus is

Q8

A sample of a radioactive element has a mass of 10g at an instant t = 0. The oppropriate mass of this element in the element in the sample after two mean lives is

Q9

If the half lives of a radioactive element that decays in 6 days is 7/8. The fraction that decays in 10 days will be

Q10

A proton, when accelerated through a potential difference of V volts, has a wavelength  associated with it. If an alpha particle ius to have the same wavelength , it must be accelerated through a potential difference of