TOP 100 Physics MCQS
All Questions for: TOP 100 Physics MCQS
Question 51: The synopsis of Einstein
- A The slower you move, the heavier you get
- B The faster you move, the heavier you get
- C None of the above
- D The faster you move, the lighter you get
Explanation:
Question 52: In which process all the heat supplied is converted into work done ?
- A isochoric
- B isentropic
- C isothermal
- D isobaric
Explanation:
Question 53: The penetrating power of X-rays depends on their______________?
- A source
- B applied voltage
- C all of the above
- D frequency
Explanation:
Question 54: The velocity of a particle of mass m of de-Broglie wavelength ? is______________?
- A v = 3
- B v = 2
- C v = 2
- D v = 2
Explanation:
Question 55: The power is the dot product of ___________ quantities.
- A Force and velocity
- B Force and time
- C None of these
- D Force and speed
Explanation:
Question 56: CFC is used in _________________?
- A Refrigeration
- B Aerosol spray
- C All of above
- D Plastic foam industry
Explanation:
Question 57: Galvanometer is a very sensitive device with______________________?
- A very low damping
- B very high damping
- C no damping at all
- D radial field disintegration
Explanation:
Question 58: A lens which converges a beam of parallel rays to a point is called______________?
- A plano convex lens
- B plano concave lens
- C converging (or convex) lens
- D diverging (or concave) lens
Explanation:
Question 59: The antiparticle of electron is: ______?
- A Meson
- B Positron
- C Proton
- D Neutron
Explanation:
Question 60: The relationship between Tesla and smaller unit Gauss of magnetic induction is given by_________________?
- A 1T = 10-2 G
- B 1T = 103 G
- C 1T = 10-4 G
- D 1T = 104 G
Explanation:
Question 61: Modern system of navigation satellites called ___________?
- A None of these
- B Navstar
- C Inertia frames of reference
- D Proton
Explanation:
Question 62: Dioptre power of an concave lens of 10 cm focal length is_______________?
- A 1 / 10 dioptre
- B 10 dioptre
- C 10 dioptre
- D 1 / 10 dioptre
Explanation:
Question 63: The sensitivity of a galvanometer is given by__________________?
- A CAN/B
- B BAN/C
- C C/BAN
- D ABC/N
Explanation:
Question 64: Which of the following properties of molecules of a gas is same for all gases at particular temperature ?
- A momentum
- B mass
- C velocity
- D kinetic energy
Explanation:
Question 65: Antimatter consists of ______________?
- A Positron
- B All of above
- C Antineutron
- D Antiproton
Explanation:
Question 66: How many main frontiers of fundamental science ?
- A 2
- B 4
- C 1
- D 3
Explanation:
Question 67: Bracket series is obtained when all transition of electron terminate on_______________?
- A 2nd orbit
- B 5th orbit
- C 4th orbit
- D 3rd orbit
Explanation:
Question 68: The density of human blood is nearly equal to____________?
- A Honey
- B Water
- C Mercury
- D Oil (kerosene)
Explanation:
Question 69: A changing magnetic flux produces around itself an induced_______________?
- A Electric field
- B Magnetic field
- C Artificial gravitational field
- D Electromagnetic force
Explanation:
Question 70: The length of the second pendulum is_________________?
- A 100 cm
- B 98 cm
- C 99 cm
- D 99.2 cm
Explanation:
Question 71: For confinement of electron in a box of radius 10-14m the electron, speed should be_____________?
- A Not be wave-like
- B 107m/sec
- C Should be greater than the speed of light.
- D Be zero
Explanation:
Question 72: An inductive coil has a resistance of 100?. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45?. What is the inductance of the coil ?
- A 12mH
- B 20mH
- C 10mH
- D 16mH
Explanation:
Question 73: Gravitation force of moon is_________?
- A 9.8 m/s
- B 3.75 m/s
- C 7.2 m/s
- D 1.62 m/s
Explanation:
Question 74: hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?
- A 0
- B 45
- C 90
Explanation:
Question 75: When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is_______________?
- A 20?
- B 2?
- C ?/2
- D ?
Explanation:
Question 76: An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if_________________?
- A B = eE/V
- B E = BeV/2
- C E = BeV
- D E = BV
Explanation:
Question 77: If a material object moves with speed of light its mass becomes ________________?
- A double of its rest mass
- B zero
- C infinite
- D equal to its rest mass
Explanation:
Question 78: Which of the following is true ?
- A the spectral series formula can be derived from the Rutherford model of the hydrogen atom.
- B Paschen series is a line spectrum in the infra red.
- C Lyman series is a continuous spectrum.
- D Balmer series is a line spectrum in the ultraviolet.
Explanation:
Question 79: An alternating current of the r.m.s value of 4.0 A and frequency 50Hz flows in a circuit containing a 10? resistor. The peak current is then ?
- A 6.66A
- B 5.66A
- C 20.66A
- D 20A
Explanation:
Question 80: Identify the correct statement about minority carriers_____________?
- A holes in n-type and free electrons in p-type
- B free electrons in n-type and p-type
- C free electrons in n-type and holes in p-type
- D holes in n-type and p-type
Explanation:
Question 81: The rectangular voltage is an example of____________________?
- A Electronic waveform
- B Continuous wave form
- C An analogue waveform
- D A digital waveform
Explanation:
Question 82: Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is______________?
- A Same
- B Greater than 82
- C Sometimes smaller some times greater
- D Smaller
Explanation:
Question 83: A central force is that which__________________?
- A Has no relation with torque
- B Can produce torque
- C Cannot produce torque
- D Some time can produce torque some time cannot
Explanation:
Question 84: Torque is defined as______________?
- A Product of force and moment arm
- B All A, B and C are correct
- C Turning effect of force
- D Cross product of position vector and force
Explanation:
Question 85: Minimum current required to produce a deflection of 1 mm on a scale at a distance of 1 meter is__________________?
- A 1:00 AM
- B 1 m A
- C 0.1 A
- D current sensitivity
Explanation:
Question 86: Choose the correct statement. In the case of AC circuit ohms law holds for_______________?
- A Instantaneous values of voltage and current
- B Effective values of voltage and current
- C Peak values of voltage and current
- D All of the above
Explanation:
Question 87: If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?
- A distortion
- B both spherical and chromatic
- C chromatic aberration
- D spherical aberration
Explanation:
Question 88: If a photon is reflected from the mirror then the change in momentum of each photon is_______________?
- A 1
- B Zero
- C Half
- D Double
Explanation:
Question 89: Speed of a body can not be_______?
- A Zero
- B None
- C Negative
- D Positive
Explanation:
Question 90: Boyles law helds for ideal gases in________________?
- A isothermal processes
- B isobaric processes
- C adiabatic processes
- D isochoric processes
Explanation:
Question 91: The electronic circuits which implement the various logic operations are called_____________?
- A Logic functions
- B Amplifier gain
- C Logic gates
- D Boolean algebra
Explanation:
Question 92: Blood vessels are______________?
- A Not rigid
- B Rigid
- C Of rubber
- D Of glass
Explanation:
Question 93: To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________?
- A 3
- B 2
- C 4
- D 5
Explanation:
Question 94: The dimension of force is__________________?
- A ML-1T-2
- B MLT-2
- C ML-1T
- D MLT-1
Explanation:
Question 95: At constant temperature the graph between V and 1/P is_____________?
- A Hyperbola
- B Parabola
- C A curve of any shape
- D A straight lime
Explanation:
Question 96: The semiconductor diode can be used as a rectifier because _______________?
- A It has high resistance to the current flow when reverse biased
- B It has low resistance to the current flow when forward biased & high resistance when reverse biased.
- C Its conductivity increases with rise of temperature.
- D It has low resistance to the current flow when forward biased.
Explanation:
Question 97: Value of
- A 6ge
- B Zero
- C ge/6
- D 2ge
Explanation:
Question 98: The equation ? = 1.22 ?/D was devised by_______________?
- A Planks
- B Raleigh
- C Einstein
- D Newton
Explanation:
Question 99: Which one of the following is not a radioactive element ?
- A Radium
- B Thorium
- C Uranium
- D Cadmium
Explanation:
Question 100: Semi-conductors with donor atoms and free electrons belong to the type________________?
- A n
- B mix
- C p
- D any of above
Explanation: