If electron are accelerated from rest through a potential difference of 10kv, what is the wavelength of the associated electron?
[m = 9.1 x 10\(^{-31}\)kg, e = 1.6 x 10\(^{-19}\)C, h = 6.6 x 10\(^{-34}\)js]

a

1.22 x 10-11m

b

3.87 x 10-10m

c

2.27 x 1011m

d

2.27 x 1014m

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a

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Discussions (16)

Giselle1234
1 year ago

The answer is wrong,it's meant to be 1.22×10^-10

Jonbellion
1 year ago

formula * h / √(2eVme)= Wavelength

FAECSB7610542
11 months ago

Mass (m) is missing in the denominator of the solution. The final answer gotten, if resolved using a calculator doesn't give the answer written.

MERCYOLADEPO
1 year ago

@myschool whats the right formula abeg with solution

JosephCosmas34
1 year ago

@blessing I don't understand

Anyiego25
2 years ago

would you mind using the calculator yourself please

MustaphaAremu
4 years ago

Can we use eV=hc/wavelength
And then introduce c which is velocity of light 3x10^8

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