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MCQ's Test For MDCAT Physics Chapter 15 Modern Physics MCQ's Test
Try The MCQ's Test For MDCAT Physics Chapter 15 Modern Physics MCQ's Test
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Total Questions20
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Time Allowed20
MDCAT Physics Chapter 15 Modern Physics MCQ's Test
00:00
Question # 1
In order to perform experiment, Davisson and Germer used accelerating voltage of:
Question # 2
De-Broglie received the Nobel prize in
Question # 3
In photoelectric effect, if we increase the frequency of the incident light then of the electrons increased
Question # 4
A.H Compton studied the scattering of X-rays by loosely bound electrons from a graph target in:
Question # 5
Moving photons posses:
Question # 6
The reverse process of photo-electric effect is called:
Question # 7
In a photocell, sodium and potassium emit electrons for:
Question # 8
Which of the particles, electron, proton and neutron moving with same speed has longest wave length?
Question # 9
The stopping potential for a certain metal is 10 volt, the max. Energy of emitted electron is:
Question # 10
Photo cells is a device which convert light into:
Question # 11
In Compton effect, it was considered that X-rays consist of:
Question # 12
Diffraction pattern has also been observed for:
Question # 13
A photo cell is based on:
Question # 14
The maximum kinetic energy of emitted photoelectrons depends upon:
Question # 15
In a photocell, cesium coated oxidized silver emits electrons for :
Question # 16
G.P Thomson revealed:
Question # 17
In photoelectric effect, electrons are emitted:
Question # 18
Photo cells are used for :
Question # 19
Rest mass energy of electron is:
Question # 20
The maximum energy of the photoelectrons can be determined by making the:
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MCAT Physics Chapter 15 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The maximum energy of the photoelectrons can be determined by making the: |
A. Anode positive
B. Anode negative
C. Cathode positive
D. Both (b) & (c)
|
| 2 | J.J Thomson finds: |
A. Particle nature of the electron
B. Dual nature of electron
C. Wave nature of electron
D. Electromagnetic nature of electron
|
| 3 | A human eye can detect the electromagnetic radiations of the type: |
A. Infrared radiations
B. For- infrared radiations
C. X-rays radiations
D. Red radiations
|
| 4 | The energy of photon of wavelength 1240 nm is: |
A. 0.5 eV
B. 1.0 eV
C. 1.5 eV
D. 2.0 eV
|
| 5 | In Compton effect, it was considered that X-rays consist of: |
A. Electrons
B. Positrons
C. Photons
D. All of these
|
| 6 | In order to increase the K.E of ejected photo electrons, there should be an increase in: |
A. Intensity of radiation
B. NoneI
C. Frequency of radiation
D. Both (b) & (c)
|
| 7 | Compton Effect makes the use of the law of conservation of: |
A. Energy
B. Momentum
C. Charge
D. Both (a) & (b)
|
| 8 | Interference and diffraction of light confirms its: |
A. Particle nature
B. Dual nature
C. Wave nature
D. Electromagnetic nature
|
| 9 | The minimum energy required by an electron to eject from metal surface is known as: |
A. Photo energy
B. Critical energy
C. Threshold energy
D. Work function
|
| 10 | Davisson and Germer, in their experiment used: |
A. Nickle crystal
B. Lead crystal
C. Graphite crystal
D. Glass
|
Test Questions
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