TOP 100 Physics MCQS
All Questions for: TOP 100 Physics MCQS
Question 251: The Capacity of doing work is called_________?
- A Work
- B Momentum
- C Power
- D Energy
Explanation:
Question 252: For a gas obeying Boyles law if the pressure is doubled the volume becomes________________?
- A one half
- B double
- C four times
- D one fourth
Explanation:
Question 253: Two parallel beams of positrons moving in the same direction will________?
- A be deflected normal to the plane containing the two beams.
- B not interact with each other
- C repel each other
- D attract each other
Explanation:
Question 254: The electrons in conduction band are free to___________________?
- A Transport impulses
- B Transport charge
- C Transport vibrations
- D Transport signals
Explanation:
Question 255: The work done in the isochoric process is________________?
- A constant
- B depends on situation
- C zero
- D variable
Explanation:
Question 256: Pair production can take place only with_________________?
- A X-rays
- B IR-rays
- C Gamma rays
- D UV-rays
Explanation:
Question 257: The angular speed for daily rotation of the earth in rad S-1 is______________?
- A 7.3 x 5 radians/second
- B 7.3 x 10 radians/second
- C 7.3 x 10-5 radians/second
- D 3.7 x 10 7.3 x 5 radians/second
Explanation:
Question 258: The mass of an object will get doubled at the speed of __________?
- A 2.6
- B 2.6
- C 2.6
- D 2.6
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Question 259: According to equation of continuity A1V1 = A2V2 = constant. The constant is equal to_______________?
- A Flow rate
- B Volume of fluid
- C Mass of fluid
- D The density of the fluid
Explanation:
Question 260: The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine_______________?
- A at any instant
- B averagely
- C during its operation
- D during one cycle
Explanation:
Question 261: In the electron microscope, electric & magnetic fields are used as_______________?
- A Electromagnetic gun
- B Deflecting charged particle
- C Source of electromagnetic waves
- D Converging source of electrons
Explanation:
Question 262: Which of the following is not a unit of length?
- A radian
- B angstrom
- C light year
- D micron
Explanation:
Question 263: Which one is not a type of dynamic equilibrium ?
- A Both A and C are corret answer
- B Translational equilibrium
- C Static equilibrium
- D Rotational equilibrium
Explanation:
Question 264: Why the needle of iron swims on water surface when it is kept gently ?
- A due to its shape
- B due to surface tension
- C the density of needle is less than that of water
- D It will remain under the water, when it will displace more water than its weight
Explanation:
Question 265: Radiations are used for the treatment of skin of a patient is_______________?
- A Beta rays
- B Gamma rays
- C X-rays
- D Alpha rays
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Question 266: Systolic pressure is called_______________?
- A High blood pressure
- B Low blood pressure
- C Abnormal blood pressure
- D Normal blood pressure
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Question 267: If the distance-time graph gives a straight line then body possesses___________?
- A Zero Velocity
- B None
- C Variable Velocity
- D Uniform Velocity
Explanation:
Question 268: The diameter of an atom is approximately_______________?
- A 10-10m
- B 10-14m
- C 10-12m
- D 10-11m
Explanation:
Question 269: CGS unit of Force is_________?
- A Dyne
- B Erg
- C Joule
- D Newton
Explanation:
Question 270: Hydrogen atom does not emit X-rays because _________________?
- A it is too small in size
- B it has a single electron
- C its energy levels are too close to each other
- D its energy levels are too far apart
Explanation:
Question 271: A photostat machine works on _____________?
- A electromagnetic image making
- B electrostatic image making
- C magnetic image making
- D thermal image making
Explanation:
Question 272: Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?
- A zero
- B f/2
- C focus
- D 2 f
Explanation:
Question 273: A wheat stone bridge is said to be balanced when____________________?
- A maximum current flows through the galvanometer branch
- B potential difference across galvanometer branch is maximum
- C potential difference across galvanometer branch is zero
- D minimum current flows through the galvanometer branch
Explanation:
Question 274: Length, mass, time, intensity of light and amount of substance are examples of ____________?
- A Derived quantities
- B Prefixes
- C Base quantities
- D Quartile quantities
Explanation:
Question 275: The name of the photon for quantum of light was proposed by________________?
- A Plank
- B Thomson
- C Ampere
- D Einstein
Explanation:
Question 276: Mass of neutron is________________?
- A 9.1 x 10-31 kg
- B 1.67 x 10-27 kg
- C 1.67 x 10-31 kg
- D 1.67 x 10-19 kg
Explanation:
Question 277: The charge on beta particle is________________?
- A +2
- B -2
- C -1
- D 1
Explanation:
Question 278: Mach is the unit of measurement in stating the speed of a moving object in relation to__________?
- A The speed of other object
- B The speed of sound
- C The speed of air resistance
- D The speed of light
Explanation:
Question 279: Which one of the following has the greatest energy gap ?
- A semi conductor
- B insulator
- C conductor
- D any of above
Explanation:
Question 280: Waves emitted from the antenna are__________________?
- A Electromagnetic waves
- B Sound waves
- C Radio waves
- D Modulated waves
Explanation:
Question 281: Rainbow is seen after rain because of hanging molecules of water which act as __________?
- A Slabs
- B Prism
- C Lens
- D Mirror
Explanation:
Question 282: Average energy required to remove one nucleon from the nucleus is called__________________?
- A Binding energy per nucleon
- B Destruction energy
- C All of above
- D Energy of decay
Explanation:
Question 283: Optics does not deal with ___________?
- A Nature of light waves
- B Lenses and mirrors
- C Characteristics of sound
- D Properties of light
Explanation:
Question 284: The relation between linear and angular acceleration is______________?
- A a = a x r
- B a = a x r
- C r = a x a
- D a = r x a
Explanation:
Question 285: A cube of side 5 cm has a charge of 6 C. The surface density of charge is_________?
- A 300 C m
- B 100 C m
- C 200 C m
- D 400 C m
Explanation:
Question 286: Joule Thomson effect is based upon __________ ?
- A Heating of gases
- B Cooling of gases
- C Sudden compression of gases
- D Sudden expansion of gases
Explanation:
Question 287: An ideal standard of measurement of a base quantity has characteristics_______________?
- A Only a and b are correct
- B Invariable
- C Accessible
- D Transportable
Explanation:
Question 288: The diameter of a lens is called________________?
- A principal axis
- B focal length
- C radius of curvature
- D aperture
Explanation:
Question 289: During fusion of hydrogen into helium________________?
- A Energy is absorbed
- B Energy is released
- C Mass is increased due to energy absorption
- D Mass is reduced due to the energy released
Explanation:
Question 290: In an electronic transition atom cannot emit______________?
- A Ultraviolet rays
- B ?-rays
- C Infra red radiation
- D Visible light
Explanation:
Question 291: The product of the frequency and time period is equal to_________________?
- A 1
- B 3
- C 2
- D 4
Explanation:
Question 292: The unit of force in CGS, system is __________?
- A Dyne
- B Pound
- C None of these
- D Newton
Explanation:
Question 293: The internal energy of the system increases__________?
- A in adiabatic compression
- B in isothermal expansion
- C in adiabatic expansion
- D in isothermal compression
Explanation:
Question 294: The natural frequency of simple pendulum depends upon_______________?
- A The square root of its length
- B It
- C It
- D Square of its length
Explanation:
Question 295: p-n junction when reversed biased acts as a_______________?
- A on switch
- B capacitor
- C inductor
- D off switch
Explanation:
Question 296: The least distance of distinct vision for a normal eye is_______________?
- A 30 cm
- B 15 cm
- C 40 cm
- D 25 cm
Explanation:
Question 297: Mass-Energy relation given by Einstein in represented as: ____________?
- A E=mv
- B E=m
- C E=hf
- D E=mc
Explanation:
Question 298: What is the SI unit of acceleration is ___________?
- A Both
- B All
- C meter per second square
- D Meter per secound
Explanation:
Question 299: A digit zero in a measurement__________________?
- A Always insignificant sign
- B Always significant
- C Significant only if left to a significant figure
- D May be significant may not significant
Explanation:
Question 300: Electromagnetic waves emitted from antenna are________________?
- A Longitudinal
- B Transverse
- C All the above
- D Stationary
Explanation: