#### Physics Mcqs – (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests

**“** Physics **Mcqs “.** Tab this page to check **“Latest **Physics **MCQs”** for the preparation of **competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs** and others. The most occurred **mcqs of ** Physics in past papers. **Past papers of ** Physics **mcqs**. **Past papers of **Physics **MCQs**. Physics Mcqs are the necessary part of any competitive / job related exams. The Physics **mcqs** having specific numbers in any written test. It is therefore everyone have to learn / remember the related Physics **mcqs**. The Important series of Physics Mcqs are given below:

**The penetration power of alpha particle as compared to beta particle is_______________?**

A. 100 times less **B. 100 times more**

C. 10 times more

D. 10 times less

**Geiger counter is suitable for _________________?**

A. Extremely fast counting

B. Fast counting **C. Slow counting**

D. All situations

**An alpha particle can produce fluorescence in__________________?**

A. Barium platinocyanide

B. ZnS

C. Calcium tungstate**D. All of above**

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

A. Energy

B. Mass

C. Charge **D. Momentum**

**CFC is used in _________________?**

A. Aerosol spray

B. Refrigeration

C. Plastic foam industry**D. All of above**

**Average distance covered by alpha particles in the air before its ionizing power ceases is called its_________________?**

A. Trajectory**B. Range**

C. Limit

D. Firing level

**Which one of the following possesses greater penetration power ?**

A. β-rays

B. α-rays

C. γ-rays**D. Neutron-rays**

**The most useful tracer is_________________?**

A. I-131

B. Sr-90

C. CA-41**D. C-14**

**X-rays are electromagnetic waves like________________?**

A. Heat waves

B. Light waves

C. Microwaves**D. γ-rays**

**The charge on beta particle is________________?**

**A. 1**

B. +2

C. -1

D. -2

**Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ?**

A. Massless

B. Chargeless **C. Highly penetrating**

D. All of above

**Beta particles ionize an atom_________________?**

A. Due to a direct collision **B. Due to the electrostatic force of repulsion**

C. Due to the electrostatic force of attraction

D. Due to the gravitational force

**Alpha particles possess greater penetration power than that of beta particles due to its_____________?**

**A. Smaller ionization power**

B. Same ionization power

C. Neither greater nor smaller ionization power

D. Greater ionization power

**Pair production cannot take place in a vacuum as ________________?**

A. Energy is not conserved

B. Mass is not conserved **C. Momentum is not conserved**

D. The chargee is not conserved

**Pair production can take place only with_________________?**

A. UV-rays **B. Gamma rays**

C. X-rays

D. IR-rays

**A device for producing high-velocity nuclei is ________________?**

A. A mass spectrograph **B. Linear accelerator**

C. Cloud chamber

D. Wilson cloud chamber

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

A. Heavy water

B. Ordinary water **C. Lead**

D. Aluminum

**The maximum safe limit dose for persons working in a nuclear power station is ________________?**

A. 4 rem per week **B. 5 rem per week**

C. 1 rem per week

D. 3 rem per week

**Radiations are used for the treatment of skin of a patient is_______________?**

A. Beta rays **B. Gamma rays**

C. Alpha rays

D. X-rays

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

A. Geology **B. Physics**

C. Chemistry

D. Biology

**Which one is not a branch of physical sciences ?**

A. Astronomy

B. Chemistry

C. Geology**D. Biology**

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

A. 3 **B. 2**

C. 1

D. 4

**How many types of units are in SI ?**

A. 2

B. 1 **C. 3**

D. 4

**In scientific notation, numbers are expressed in________________?**

**A. Power of ten**

B. Reciprocal

C. Powers of two

D. Decimal

##### Physics Mcqs

**1024 can be written in scientific notation as______________?**

**A. 1.024×103**

B. 0.000976

C. 2 Raised to power 10

D. 1/0.00097

**Prefix deca represents_______________?**

**A. 10 Raised to power 1**

B. 10 Raised to power 3

C. 10 Raised to power 2

D. 10 Raised to power -1

**The error in measurement may occur due to_________________?**

A. The inexperience of a person

B. Inappropriate method

C. The faulty apprentice **D. Due to all reasons in A, B and C**

**The uncertainty in a measurement may occur due to_______________?**

A. Inadequate technique

B. Natural variation of the object to be measured

C. Limitation of an instrument **D. All given in A, B and C**

**Random errors can be reduced by_______________?**

A. Comparing the instrument with another more accurate one

B. All methods explained in A, B and C **C. Taking mean of several measurements**

D. All methods explained in A, B and C

**In any measurement the significant figures are______________?**

A. Only accurately known digits

B. All accurately known and all doubtful digits

C. Only doubtful digits**D. All accurately known digits and the first doubtful digit**

**A digit zero in a measurement__________________?**

**A. May be significant may not significant**

B. Always insignificant sign

C. Always significant

D. Significant only if left to a significant figure

**Number of significant figures in 0.0173 is_________________?**

**A. 3**

B. 5

C. 4

D. 2

**Smaller the least count of the instrument more is the measurement________________?**

A. Accurate and precise **B. Precise**

C. Accurate

D. None of these

**The dimension of force is__________________?**

A. ML-1T **B. MLT-2**

C. MLT-1

D. ML-1T-2

**ML-1 T-2 is the dimension of_______________?**

A. Momentum **B. Pressure**

C. Force

D. Energy

**Dimensional analysis is helpful for__________________?**

A. Verification of laws

B. Checking the homogeneity of a physical equation

C. Deriving a possible formula **D. Only A and B are correct**

**Which equation is not dimensionally correct ?**

A. Vf=Vi+at

B. E=mc2 **C. S=Vt2**

D. S=1/2at2

**SI unit of the coefficient of viscosity is___________________?**

A. Kg.m.S **B. Kg m-1.S-1**

C. Kg.m.S-1

D. Kg-1.m-1.S-1

**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 (ii)

B. Only (i) **C. Only (iii)**

D. Both (i) and (ii)

**Absolute uncertainty in a measurement depends upon______________?**

A. Percentage error in the measurement **B. Least count of the instrument**

C. The magnitude of the measurement

D. All of a, b and C

**Steradian is the SI unit of________________?**

A. Both plane angle and solid angle **B. Solid angle**

C. Plane angle

D. Neither plane angle nor solid angle

**An ideal standard of measurement of a base quantity has characteristics_______________?**

A. Invariable

B. Accessible

C. Transportable**D. Only a and b are correct**

**Total uncertainty, in the result obtained from the subtraction of two measurements, is equal to_______________?**

**A. Sum of their absolute uncertainties**

B. The product of their absolute uncertainties

C. The difference of their absolute uncertainties

D. Division of their absolute uncertainties

**Which one is the highest power multiple ?**

**A. Giga**

B. Mega

C. Beta

D. Deca

**One pico stands for_________________?**

A. 10 raised to power -9 **B. 10 raised to power -12**

C. 10 raised to power -15

D. 10 raised to power -6

**Unit of G is ______________?**

A. Nm2Kg-2 **B. Nm2Kg**

C. Nm2Kg2

D. None

**The unit of force is _________ and its symbol is ______________ Which is the correct pair ?**

A. Newton, N

B. Newton, n

C. newton, n**D. newton, N**

**How many main frontiers of fundamental science ?**

A. 2

B. 1 **C. 3**

D. 4

**One light year is equal to________________?**

**A. 9.5x1015m**

B. 9.5x1015Km

C. 9.5x1015sec

D. 9.5x1015cm

**Which one is the derived quantity in SI units _____________?**

A. Plane angle **B. Electric charge**

C. Electric current

D. Amount of substance

**Which one is the correct representation of the unit of pressure ?**

A. Newton/meter2 **B. newton/meter2**

C. Newton/Meter2

D. newton/Meter2

**Which one is the dimensionally correct equation ?**

A. V=St **B. S=Vit+1/2at2**

C. f=vt

D. V=f/t

**Zero error of the instrument is a type of_________________?**

A. Personal error

B. Random error **C. Systematic error**

D. Classified error

**In multiplication and division of measurement______________?**

**A. Percentage uncertainties are added**

B. Percentage uncertainties are divided

C. Absolute uncertainties are added

D. Absolute uncertainties are divided

**The number of significant figures in 5.400 is________________?**

A. 5

B. 3

C. 2**D. None**

**To reduce the uncertainty in the timing experiment______________?**

A. Conduct at room temperature

B. Highly precise instrument

C. Count number of vibration**D. Both a and C**

**The number of significant figures in the length of a bar 6200mm measured by meter rod is_______________?**

**A. 4**

B. 2

C. 3

D. None of these

**The number 76.85 is rounded off up to two significant figures as_____________?**

A. 76.9 **B. 77**

C. 76.8

D. None of these

**Which of the following is not a correct representation method for prefixes______________?**

A. 10km

B. 1mm **C. 1000um**

D. Both A and B

**The rotational K.E of the hoop is equal to the______________?**

**A. its translational K.E**

B. double than its translational K.E

C. half than its translational K.E

D. four times than its translational K.E

**A hoop and disc have same mass and radius. Their rotational K.E are related by an equation______________?**

A. K.E hoop = 1/2K.E disc **B. K.E hoop = 2K.E disc**

C. K.E hoop = K.E disc

D. K.E hoop = 4K.E disc

**The critical speed of an artificial satellite is_______________?**

A. 8.1 Kms-1

B. 8 Kms-1 **C. 7.9 Kms-1**

D. 8 ms-1

**Geostationary satellite completes one rotation around the earth in_______________?**

A. 3 hours

B. 12 hours

C. 6 hours **D. 24 hours**

**The radius of geostationary orbit from the centre of the earth is nearly______________?**

**A. 42000 km**

B. 24000 km

C. 36000 km

D. 18000 km

**According to Einstein, the gravitational interaction is possible between_______________?**

A. electromagnetic radiations **B. material objects and electromagnetic radiation only**

C. material objects only

D. none of the above

**One radian is equal to______________?**

A. 87.3° **B. 57.3°**

C. 67.3°

D. 60°

**The period of a circular motion is given by_______________?**

A. T = πw

B. T = πv

C. T = 2πr**D. T = 2πr/v**

**The direction of the linear velocity of a body moving in a circle is______________?**

A. directed towards the centre **B. along the tangent**

C. along the axis of rotation

D. directed away from the centre

**When a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?**

A. 0°

B. 180° **C. 90°**

D. 45°

**The circumference subtends an angle________________?**

A. π/2 radian **B. 2π radian**

C. π radian

D. 4π radian

**The relation between linear and angular acceleration is______________?**

A. a = r x a

B. a = a x r **C. a = a x r**

D. r = a x a

**When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________?**

A. Velocity of body

B. Mass of a body **C. The tension in the string**

D. Centripetal acceleration

**Centripetal force performs_______________?**

A. Maximum work

B. Negative work

C. Minimum work **D. No work**

**When a body moves in a circle of radius r with linear speed V its centripetal force is_______________?**

A. mV/r

B. mV/r2 **C. mV2/r**

D. mV2/r2

**A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is______________?**

A. Zero

B. Maximum **C. Equal to the weight of the stone**

D. Less than the weight of the stone

**The span of the broad jump depends upon_______________?**

A. Height of jump

B. Mass of the jumper **C. Angle of projection**

D. None

**In case of planets the necessary acceleration is provided by______________?**

**A. Gravitational force**

B. Coulomb force

C. Frictional force

D. Centripetal force

**If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________?**

A. 1.6 rad. S-1 **B. 5 rad. S-1**

C. 4 rad. S-1

D. 2.8 ms-1

**A body can have constant velocity when it follows a_____________?**

A. Circular path

B. Elliptical path

C. Parabolic path**D. Rectilinear path**

**A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________?**

A. 2πR

B. πR **C. 0**

D. 4πR

**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. 3.7 x 10 7.3 x 5 radians/second**D. 7.3 x 10-5 radians/second**

**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. π **B. π/2**

C. 2π

D. 20π

**A cyclist cycling around a circular racing track skids because_____________?**

A. the centripetal force upon him is less than limiting friction**B. the centripetal force upon him is greater than limiting friction**

C. the friction between the tyres of the cycle and road vanishes

D. the centripetal force upon him is equal to the limiting friction

**If a wheel of radius r turns through an angle of 30° then the distance through which any point on its rim moves is______________?**

A. V/30 x r **B. π/6 x r**

C. π /3 x r

D. π / 180 x r

**In an angular motion, Newton’s second law of motion is_____________?**

A. F=τp/It

B. F=ma **C. Στ = I α**

D. All above

**The angular speed of seconds hand of a watch in rads-1 is______________?**

A. π/2

B. π **C. π/30**

D. π/180

**The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________?**

A. 3π

B. π

C. 6π**D. 12π**

**What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ?**

**A. 1N**

B. 2N

C. 10N

D. 100N

**If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is________________?**

A. At any point during motion **B. At the lowest point**

C. At the highest point

D. At the point where gravity is not acting

**Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be_______________?**

A. 2πR

B. πR **C. 0**

D. 4πR

**A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is_______________?**

A. mg – ma

B. mg **C. mg + ma**

D. mg – ma

**Who discovered the inverse square law for gravity ?**

A. Galileo

B. Einstein **C. Newtons**

D. Plank

**The planet nearest to the earth is______________?**

**A. Venus**

B. Uranus

C. Mercury

D. Sun

**A satellite moving around the earth constitutes______________?**

A. Neither inertial nor non-inertial **B. Non-inertial frame**

C. An inertial frame of reference

D. Both inertial and non-inertial

**Minimum number of communication satellites required to cover the whole earth is______________?**

A. 2 **B. 3**

C. 4

D. 5

**A body of 2 kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be______________?**

A. 19.6 N

B. 9.8 N

C. 129.4 N**D. 39.2 N**

**If a body of mass 10 kg is allowed to fall freely, its weight becomes______________?**

**A. 0**

B. 9.8 N

C. 89N

D. 10N

**How many days would be in a year if the distance between the earth and the sun were reduced to half of its present value (assuming circular orbit) ?**

A. 730 days

B. 365 days

C. 329 days**D. 129 days**

**When a body is moving along a circular path it covers a certain angle in a given interval of time. Such type of motion is__________________?**

A. Vibratory motion

B. Rotatory motion

C. Linear motion **D. Angular motion**

**Coefficient of viscosity of honey is greater than______________?**

A. Water

B. Milk

C. Charcoal**D. Water**