The Sports Zones
Home
MCQs
General Science — Learn
Basic Science De Broglie Waves
Review each question and reveal answers to strengthen your understanding
Home
/
MCQs
/
Basic Science De Broglie Waves
1
The de Broglie wavelength of an electron of kinetic energy 500 e V is
A
54.92
B
0.5492
C
5492
D
5.492
Show Answer
✅ Correct Answer: 2
2
A magnetic lens can focus
A
sound waves
B
rays
C
a beam of light
D
a beam of electrons
Show Answer
✅ Correct Answer: 4
3
In an electron microscope electrons are focused by means of
A
convex lens
B
concave mirror
C
liquid lens
D
magnetic lens
Show Answer
✅ Correct Answer: 4
4
The wave associated with a moving particle is called mechanical wave
A
longitudinal wave
B
mechanical wave
C
de Broglie wave.n
D
Plancks wave
Show Answer
✅ Correct Answer: 3
5
The momentum of an electron if its wavelength is 2� is 2.3 ? 10-24 kg ms-1 3.315 ? 10-24 kg ms-1
A
2.3 ? 10-24 kg ms-1
B
3.315 ? 10-24 kg ms-1
C
1.3 ? 10-24 kg ms-1
D
13 ? 10-24 kg ms-1
Show Answer
✅ Correct Answer: 2
6
The de Broglie wavelength associated with an electron moving with a speed of 107m/s
A
0.728
B
7.28
C
72.8
D
728
Show Answer
✅ Correct Answer: 1
7
he focal length of magnetic lens used in an electron microscope depends on
A
the velocity of electrons
B
the magnitude of current passing through energizing coils
C
the medium in between energizing coils
D
all the above
Show Answer
✅ Correct Answer: 4
8
In electron microscope the electron beam is focused by varying the
A
wavelength of electron
B
current through the emerging coil
C
velocity of electron
D
thickness of colloidal film
Show Answer
✅ Correct Answer: 2
9
Einsteins mass-energy relation is
A
E = mc
B
E = mc2
C
E = m2c
D
E = m2c2
Show Answer
✅ Correct Answer: 2
10
The special feature of an electron microscope is its
A
high resolving power
B
compactness
C
low cost
D
resolving power being equal to that of an optical microscope
Show Answer
✅ Correct Answer: 1
11
Electron microscope works in
A
vacuum
B
atmospheric pressure
C
very high pressure
D
any pressure
Show Answer
✅ Correct Answer: 1
12
The wave nature of electron is applied in the field of
A
electron microscopy
B
fusion reactors
C
artificial radioactivity
D
satellite launching
Show Answer
✅ Correct Answer: 1
13
In an electron microscope the object is enclosed in
A
a glass plate
B
liquid
C
water
D
colloidal film
Show Answer
✅ Correct Answer: 4
Back to All Quizzes