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JEEMAIN and NEET
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NEET PAST PAPERS
>>
2017
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Q)
The photoelectric threshold wavelength of silver is
3250
×
10
–
10
m
. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength
2536
×
10
–
10
m
is : <br> (Given
h
=
4.14
×
10
−
15
e
V
s
and
c
=
3
×
10
8
m
s
−
1
)
( A )
≈
6
×
10
5
m
/
s
−
1
( B )
≈
0.3
×
10
6
m
/
s
−
1
( C )
≈
0.6
×
10
5
m
/
s
−
1
( D )
≈
61
×
10
3
m
/
s
−
1
Share
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