Question

An electron has wavelength 7Ao. The potential by which the electron is accelerated will be:​

Answer 1

Answer:

0.0826V

If electron is accelerated by V volt,

K.E=eV=  

2

1

​  

mv  

2

 

λ=  

mv

h

​  

 

λ=  

2eVm

​  

 

h

​  

;λ=1A  

o

 

On solving, V=0.0826V

Answer 2

Answer:

Correct option is

C

0.0826V

If electron is accelerated by V volt,

K.E=eV=

2

1

mv

2

λ=

mv

h

λ=

2eVm

h

;λ=1A

o

On solving, V=0.0826V