Basic Physics Mcqs - Set 11

1)   Geiger counter is suitable for _________________?

a. Fast counting
b. Extremely fast counting
c. Slow counting
d. All situations
Answer  Explanation 

ANSWER: Slow counting

Explanation:
No explanation is available for this question!


2)   An alpha particle can produce fluorescence in__________________?

a. ZnS
b. Barium platinocyanide
c. Calcium tungstate
d. All of above
Answer  Explanation 

ANSWER: All of above

Explanation:
No explanation is available for this question!


3)   Pair production cannot take place in a vacuum as ________ is not conserved ?

a. Energy
b. Charge
c. Mass
d. Momentum
Answer  Explanation 

ANSWER: Momentum

Explanation:
No explanation is available for this question!


4)   CFC is used in _________________?

a. Refrigeration
b. Aerosol spray
c. Plastic foam industry
d. All of above
Answer  Explanation 

ANSWER: All of above

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Range

Explanation:
No explanation is available for this question!


6)   Which one of the following possesses greater penetration power ?

a. α-rays
b. β-rays
c. γ-rays
d. Neutron-rays
Answer  Explanation 

ANSWER: Neutron-rays

Explanation:
No explanation is available for this question!


7)   The most useful tracer is_________________?

a. Sr-90
b. I-131
c. CA-41
d. C-14
Answer  Explanation 

ANSWER: C-14

Explanation:
No explanation is available for this question!


8)   X-rays are electromagnetic waves like________________?

a. Light waves
b. Heat waves
c. Microwaves
d. γ-rays
Answer  Explanation 

ANSWER: γ-rays

Explanation:
No explanation is available for this question!


9)   The charge on beta particle is________________?

a. 1
b. -1
c. +2
d. -2
Answer  Explanation 

ANSWER: 1

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Highly penetrating

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Due to the electrostatic force of repulsion

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Smaller ionization power

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Momentum is not conserved

Explanation:
No explanation is available for this question!


14)   Pair production can take place only with_________________?

a. X-rays
b. Gamma rays
c. UV-rays
d. IR-rays
Answer  Explanation 

ANSWER: Gamma rays

Explanation:
No explanation is available for this question!


15)   A device for producing high-velocity nuclei is ________________?

a. Cloud chamber
b. Linear accelerator
c. A mass spectrograph
d. Wilson cloud chamber
Answer  Explanation 

ANSWER: Linear accelerator

Explanation:
No explanation is available for this question!


16)   Which of the following will be a better shield against gamma rays ?

a. Ordinary water
b. Heavy water
c. Lead
d. Aluminum
Answer  Explanation 

ANSWER: Lead

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 5 rem per week

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Gamma rays

Explanation:
No explanation is available for this question!


19)   Which branch of science plays an important role in the development of technology and engineering ?

a. Chemistry
b. Physics
c. Geology
d. Biology
Answer  Explanation 

ANSWER: Physics

Explanation:
No explanation is available for this question!


20)   Which one is not a branch of physical sciences ?

a. Chemistry
b. Astronomy
c. Geology
d. Biology
Answer  Explanation 

ANSWER: Biology

Explanation:
No explanation is available for this question!


21)   The number of categories in which physical quantities are divided is_____________?

a. 1
b. 2
c. 3
d. 4
Answer  Explanation 

ANSWER: 2

Explanation:
No explanation is available for this question!


22)   How many types of units are in SI ?

a. 1
b. 2
c. 3
d. 4
Answer  Explanation 

ANSWER: 3

Explanation:
No explanation is available for this question!


23)   In scientific notation, numbers are expressed in________________?

a. Power of ten
b. Powers of two
c. Reciprocal
d. Decimal
Answer  Explanation 

ANSWER: Power of ten

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 1.024×103

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 10 Raised to power 1

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Due to all reasons in A, B and C

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: All given in A, B and C

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Taking mean of several measurements

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: All accurately known digits and the first doubtful digit

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: May be significant may not significant

Explanation:
No explanation is available for this question!


31)   Number of significant figures in 0.0173 is_________________?

a. 3
b. 4
c. 5
d. 2
Answer  Explanation 

ANSWER: 3

Explanation:
No explanation is available for this question!


32)   Smaller the least count of the instrument more is the measurement________________?

a. Accurate
b. Precise
c. Accurate and precise
d. None of these
Answer  Explanation 

ANSWER: Precise

Explanation:
No explanation is available for this question!


33)   The dimension of force is__________________?

a. MLT-1
b. MLT-2
c. ML-1T
d. ML-1T-2
Answer  Explanation 

ANSWER: MLT-2

Explanation:
No explanation is available for this question!


34)   ML-1 T-2 is the dimension of_______________?

a. Force
b. Pressure
c. Momentum
d. Energy
Answer  Explanation 

ANSWER: Pressure

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Only A and B are correct

Explanation:
No explanation is available for this question!


36)   Which equation is not dimensionally correct ?

a. E=mc2
b. Vf=Vi+at
c. S=Vt2
d. S=1/2at2
Answer  Explanation 

ANSWER: S=Vt2

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Kg m-1.S-1

Explanation:
No explanation is available for this question!


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)
Answer  Explanation 

ANSWER: Only (iii)

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Least count of the instrument

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: Solid angle

Explanation:
No explanation is available for this question!