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Class 12
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Physics
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Dual Nature of Radiation and Matter
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Easy Questions
Dual Nature Of Radiation And Matter
Physics
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An electron beam after collision with the target produces X-rays of wavelength
4
A
0
. The velocity of the electron beam is
A
3
.
3
1
×
1
0
7
m
/
s
B
6
.
3
1
×
1
0
7
m
/
s
C
8
.
3
1
×
1
0
7
m
/
s
D
9
.
3
1
×
1
0
7
m
/
s
Easy
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>
A proton when accelerated through a potential difference of V volt has a wavelength
λ
associated with it. An
α
- particle in order to have the same wavelength
λ
must be accelerated through a p.d. of
A
V/8 volt
B
V/4 volt
C
V volt
D
2V volt
Easy
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>
The momentum of a proton is p. The corresponding wavelength is
A
h/p
B
hp
C
p/h
D
h
p
Easy
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>
Moving with the same velocity, one of the following has the longest de Broglie wavelength
A
β
−
particle
B
α
−
particle
C
proton
D
neutron
Easy
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>
Einstein’s photoelectric equation states that
E
k
=
h
v
−
W
, In this equation
E
k
refers to :
A
Kinetic energy of all ejected electrons
B
Mean kinetic energy of emitted electrons
C
Minimum kinetic energy of emitted electrons
D
Maximum kinetic energy of emitted electrons
Easy
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>
The wavelength of matter waves does not depend on
A
Momentum
B
Velocity
C
Mass
D
Charge
Easy
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>
De-Broglie wavelength depends on
A
Mass of the particle
B
Size of the particle
C
Material of the particle
D
Shape of the particle
Easy
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>
If Planck’s constant is denoted by h and electronic charge by e, then photoelectric effect allows determination of:
A
Only h
B
Only e
C
Both h and e
D
Only h/e
Easy
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>
Matter waves are:
A
Electromagnetic waves
B
Mechanical waves
C
Either mechanical or electromagnetic waves
D
Neither mechanical nor electromagnetic waves
Easy
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>
The Einstein’s photo-electric equation is based upon the conservation of
A
Mass
B
Momentum
C
Angular momentum
D
Energy
Easy
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>