Question

What is the speed and de-Broglie wavelength of an electron that has been accelerated by a potential difference of 500V?

Answer 1

Answer:

HII MATE

HERE'S THE ANSWER

Explanation:

We know that,

2

1

mv

2

=K.E.=ev

Charge on electron: 1.6×10

−19

coulombs

Mass of electron=9.1×10

−31

kg

2

1

×9.1×10

−31

×v

2

=1.6×10

−19

×100

v

2

=2×1.6×10

−9

×

9.1×10

−31

100

v

2

=

0.0150

v=1.88×10

6

m/s

Now, λ=

mv

h

∴λ=0.1226nm.

HOPE IT WILL HELP

Answer 2

We know that,

2

1

mv

2

=K.E.=ev

Charge on electron: 1.6×10

−19

coulombs

Mass of electron=9.1×10

−31

kg

2

1

×9.1×10

−31

×v

2

=1.6×10

−19

×100

v

2

=2×1.6×10

−9

×

9.1×10

−31

100

v

2

=

0.0150

v=1.88×10

6

m/s

Now, λ=

mv

h

∴λ=0.1226nm.

solution