1) Geiger counter is suitable for _________________? a. Fast counting b. Extremely fast counting c. Slow counting d. All situations
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2) An alpha particle can produce fluorescence in__________________? a. ZnS b. Barium platinocyanide c. Calcium tungstate d. All of above
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3) Pair production cannot take place in a vacuum as ________ is not conserved ? a. Energy b. Charge c. Mass d. Momentum
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4) CFC is used in _________________? a. Refrigeration b. Aerosol spray c. Plastic foam industry d. All of above
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5) Average distance covered by alpha particles in the air before its ionizing power ceases is called its_________________? a. Trajectory b. Range c. Firing level d. Limit
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6) Which one of the following possesses greater penetration power ? a. α-rays b. β-rays c. γ-rays d. Neutron-rays
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7) The most useful tracer is_________________? a. Sr-90 b. I-131 c. CA-41 d. C-14
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8) X-rays are electromagnetic waves like________________? a. Light waves b. Heat waves c. Microwaves d. γ-rays
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9) The charge on beta particle is________________? a. 1 b. -1 c. +2 d. -2
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10) Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ? a. Chargeless b. Massless c. Highly penetrating d. All of above
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11) Beta particles ionize an atom_________________? a. Due to the electrostatic force of attraction b. Due to the electrostatic force of repulsion c. Due to a direct collision d. Due to the gravitational force
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12) Alpha particles possess greater penetration power than that of beta particles due to its_____________? a. Smaller ionization power b. Greater ionization power c. Neither greater nor smaller ionization power d. Same ionization power
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13) Pair production cannot take place in a vacuum as ________________? a. Mass is not conserved b. Energy is not conserved c. Momentum is not conserved d. The chargee is not conserved
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14) Pair production can take place only with_________________? a. X-rays b. Gamma rays c. UV-rays d. IR-rays
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15) A device for producing high-velocity nuclei is ________________? a. Cloud chamber b. Linear accelerator c. A mass spectrograph d. Wilson cloud chamber
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16) Which of the following will be a better shield against gamma rays ? a. Ordinary water b. Heavy water c. Lead d. Aluminum
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17) The maximum safe limit dose for persons working in a nuclear power station is ________________? a. 1 rem per week b. 5 rem per week c. 4 rem per week d. 3 rem per week
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18) Radiations are used for the treatment of skin of a patient is_______________? a. Alpha rays b. Gamma rays c. Beta rays d. X-rays
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19) Which branch of science plays an important role in the development of technology and engineering ? a. Chemistry b. Physics c. Geology d. Biology
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20) Which one is not a branch of physical sciences ? a. Chemistry b. Astronomy c. Geology d. Biology
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21) The number of categories in which physical quantities are divided is_____________? a. 1 b. 2 c. 3 d. 4
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22) How many types of units are in SI ? a. 1 b. 2 c. 3 d. 4
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23) In scientific notation, numbers are expressed in________________? a. Power of ten b. Powers of two c. Reciprocal d. Decimal
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24) 1024 can be written in scientific notation as______________? a. 1.024×103 b. 2 Raised to power 10 c. 0.000976 d. 1/0.00097
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25) Prefix deca represents_______________? a. 10 Raised to power 1 b. 10 Raised to power 2 c. 10 Raised to power 3 d. 10 Raised to power -1
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26) The error in measurement may occur due to_________________? a. The inexperience of a person b. The faulty apprentice c. Inappropriate method d. Due to all reasons in A, B and C
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27) The uncertainty in a measurement may occur due to_______________? a. Limitation of an instrument b. Natural variation of the object to be measured c. Inadequate technique d. All given in A, B and C
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28) Random errors can be reduced by_______________? a. Taking zero correction b. Comparing the instrument with another more accurate one c. Taking mean of several measurements d. All methods explained in A, B and C
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29) In any measurement the significant figures are______________? a. All accurately known and all doubtful digits b. Only accurately known digits c. Only doubtful digits d. All accurately known digits and the first doubtful digit
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30) A digit zero in a measurement__________________? a. May be significant may not significant b. Always significant c. Always insignificant sign d. Significant only if left to a significant figure
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31) Number of significant figures in 0.0173 is_________________? a. 3 b. 4 c. 5 d. 2
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32) Smaller the least count of the instrument more is the measurement________________? a. Accurate b. Precise c. Accurate and precise d. None of these
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33) The dimension of force is__________________? a. MLT-1 b. MLT-2 c. ML-1T d. ML-1T-2
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34) ML-1 T-2 is the dimension of_______________? a. Force b. Pressure c. Momentum d. Energy
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35) Dimensional analysis is helpful for__________________? a. Deriving a possible formula b. Checking the homogeneity of a physical equation c. Verification of laws d. Only A and B are correct
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36) Which equation is not dimensionally correct ? a. E=mc2 b. Vf=Vi+at c. S=Vt2 d. S=1/2at2
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37) SI unit of the coefficient of viscosity is___________________? a. Kg.m.S-1 b. Kg m-1.S-1 c. Kg.m.S d. Kg-1.m-1.S-1
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38) Three students measured the length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is a correct record ? a. Only (i) b. Only (ii) c. Only (iii) d. Both (i) and (ii)
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39) Absolute uncertainty in a measurement depends upon______________? a. The magnitude of the measurement b. Least count of the instrument c. Percentage error in the measurement d. All of a, b and C
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40) Steradian is the SI unit of________________? a. Plane angle b. Solid angle c. Both plane angle and solid angle d. Neither plane angle nor solid angle
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