Question 1.
Resistance of human body in dry condition
A. 10 ohm
B. 1000 ohm
C. 10000 ohm
D. 100000 ohm
Ans: D. 100000 ohm
Question 2.
A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf’s is :
A. 3:4
B. 5:4
C. 5:1
D. 3:2
Ans: D. 3:2
Question 3.
The ”Choke’ used with a tube light is basically
A. An inductor
B. A capacitor
C. A transformer
D. A resistor
Ans: A. An inductor
Question 4.
The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by
A.10 MeV
B. 100 MeV
C. 1 MeV
D. 0.1 MeV
Ans: A.10 MeV
Question 5.
The purpose of choke in a fluorescent lamp is :
A. To increase the current flow
B. To decrease the current flow
C. To decrease the resistance
D. Ro decrease the voltage momentarily
Ans: B. To decrease the current flow
Question 6.
Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be
A. P
B. 3P
C. P/3
D. 2p/ 3
Ans: B. 3P
Question 7.
For photoelectric effect to take place, the metal used as the cathode should have __
A. High melting point
B. Low melting point
C. Low work function
D. Low resistance
Ans: C. Low work function
Question 8.
The energy of a photon varies directly with its
A. Wave length
B. Frequency
C. Speed
D. None of the above
Ans: B. Frequency
Question 9.
An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct?
A. Ve > Vp
B. Ve < Vp
C. Ve = Vp
D. Cannot be determined
Ans: A. Ve > Vp
Question 10.
A galvanometer can be converted into a voltmeter by connecting with it a
A. High resistance in parallel
B. Low resistance on parallel
C. High resistance on series
D. Low resistance in series
Ans: C. High resistance on series
Question 11.
Which phenomena shows the particle nature of light?
A. Diffraction
B.Interference
C. Photoelectric effect
D. Polarisation
Ans: C. Photoelectric effect
Question 12.
A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?
A. The wavelength of X-ray photon is less than the wavelength of visible radiation photon.
B. Both the photons have different energies.
C. The speeds of both the photons in vacuum are different
D. The frequency of X-ray photon is higher than the frequency of visible radiation photon.
Ans: C. The speeds of both the photons in vacuum are different
Question 13.
Superconductors are those elements
A. Whose conductivity is intermediate between metals and insulators
B. Whose resistance falls almost to zero at very low temperatures
C. Which turn into insulators at very low temperatures
D. Which conduct electricity only at super-high temperatures
Ans: B. Whose resistance falls almost to zero at very low temperatures
Question 14.
In superconductors, the energy gap is due to
A. Electron-electron interaction
B. Electron-phonon interaction
C. Phonon-phonon interaction
D. Electron-photon intercation
Ans: B. Electron-phonon interaction
Question 15.
According to the quantum theory of light, the energy of light is carried in discrete units are called
A. Photoelectrons
B. Protons
C. Electrons
D. Photons
Ans: D. Photons
Question 16.
The threshold frequency is the frequency below which :
A. Photo current increases with voltage
B. Photo current decreases with voltage
C. Photo electric emission is not possible
D. Photo current is constant
Ans: C. Photo electric emission is not possible
Question 17.
A device used for converting a.c. into d.c. is called
A. Transformer
B. Rectifier
C. Induction coil
D. Dynamo
Ans: B. Rectifier
Question 18.
Electrical Pressure is also called
A. Current
B. Voltage
C. Resistance
D. Power
Ans: B. Voltage
Question 19.
Photon is the fundamental unit/quantum of
A. Gravitation
B. Electricity
C. Magnetism
D. Light
Ans: D. Light
Question 20.
Which of the following supports particle nature of photons ?
A. Diffraction
B. Polarization
C. Photoelectric effect
D. Interference
Ans: C. Photoelectric effect
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
- Physics MCQs Set-7
- Physics MCQs Set-8
- Physics MCQs Set-9
- Physics MCQs Set-10
- Physics MCQs Set-11
- Physics MCQs Set-12
- Physics MCQs Set-13
- Physics MCQs Set-14
- Physics MCQs Set-15
- Physics MCQs Set-16
- Physics MCQs Set-17
- Physics MCQs Set-18
- Physics MCQs Set-19
- Physics MCQs Set-20
- Physics MCQs Set-21
- Physics MCQs Set-22
- Physics MCQs Set-23
- Physics MCQs Set-24
- Physics MCQs Set-25
- Physics MCQs Set-26
- Physics MCQs Set-27
- Physics MCQs Set-28
- Physics MCQs Set-29
- Physics MCQs Set-30
- Physics MCQs Set-31
- Physics MCQs Set-32
- Physics MCQs Set-33
- Physics MCQs Set-34
- Physics MCQs Set-35
- Physics MCQs Set-36
- Physics MCQs Set-37
- Physics MCQs Set-38
- Physics MCQs Set-39
- Physics MCQs Set-40
- Physics MCQs Set-41
- Physics MCQs Set-42
- Physics MCQs Set-43
- Physics MCQs Set-44
- Physics MCQs Set-45
- Physics MCQs Set-46
- Physics MCQs Set-47
- Physics MCQs Set-48
- Physics MCQs Set-49
- Physics MCQs Set-50
- Physics MCQs Set-51
- Physics MCQs Set-52
- Physics MCQs Set-53
- Physics MCQs Set-54
- Physics MCQs Set-55
- Physics MCQs Set-56
- Physics MCQs Set-57
- Physics MCQs Set-58
- Physics MCQs Set-59
- Physics MCQs Set-60
- Physics MCQs Set-61
- Physics MCQs Set-62
- Physics MCQs Set-63
- Physics MCQs Set-64
- Physics MCQs Set-65
- Physics MCQs Set-66
- Physics MCQs Set-67
- Physics MCQs Set-68
- Physics MCQs Set-69
- Physics MCQs Set-70
- Physics MCQs Set-71
- Physics MCQs Set-72
- Physics MCQs Set-73
- Physics MCQs Set-74
- Physics MCQs Set-75
- Physics MCQs Set-76
We hope the given MCQ Questions for Physics GK PDF Free Download will definitely yield fruitful results. If you have any queries related to Physics GK Multiple Choice Questions with Answers, drop your questions below and will get back to you in no time.