Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Physics MCQ (Multiple Choice Questions)

 Que- Which one is not a branch of physical sciences? 

a. chemistry  

b. astronomy 

c. geology 

d. biology 

Answer- biology

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

a. chemistry  

b. physics 

c. geology 

d. biology 

Answer- physics

Que- The number of categories in which physical quantities are divided are  

a. one 

b. two 

c. three 

d. four 

Answer- two

Que- How many types of units are in SI? 

a. one 

b. two 

c. three 

d. four 

Answer- three

Que- In scientific notation numbers are expressed in  

a. power of ten  

b. powers of two 

c. reciprocal 

d. decimal 

Answer- power of ten 

Que- 1024 can be written in scientific notation as  

a. 1.024x10^3 

b. 2 Raised to power 10 

c. 0.000976 

d. 1/0.00097 

Answer- 1.024x10^3

Que- Preftix 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- 10 Raised to power 1

Que- The error in measurement may occur due to  

a. inexperience of a person 

b. the faulty apparantus 

c. inappropriate method 

d. due to all reasons in a, b and c 

Answer- due to all reasons in a, b and c

Que- 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 of technique 

d. all given in a , b and c 

Answer- all given in a , b and c

Que- Random errors can be reduced by  

a. taking zero correction 

b. comparing the instrument with another more accurate one 

c. taking mean of several measurement 

d. all methods explained in a, b and c 

Answer- taking mean of several measurement

Que- 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 doubuful digit 

Answer- all accurately known digits and the first doubuful digit

Que- A digit zero in a measurement  

a. may be significant may not significant 

b. always significant 

c. always insignificantsig 

d. significant only if left to a significant figure 

Answer- may be significant may not significant

Que- Number of significant figures in 0.0173 are  

a. three 

b. four 

c. five 

d. two 

Answer- three

Que- Smaller the least count of the instrument more is the measurement 

a. accurate  

b. precise 

c. accurate and precise 

d. none of these 

Answer- precise

Que- The dimension of force is  

a. MLT-1 

b. MLT-2 

c. ML-1T 

d. ML-1T-2 

Answer- MLT-2

Que- ML-1 T-2 is the dimension of  

a. force 

b. pressure 

c. momentum 

d. energy 

Answer- pressure

Que- 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- only a and b are correct

Que- Which equation is not dimensionally correct? 

a. E=mc2 

b. Vf=Vi+at 

c. S=Vt2 

d. S=1/2at2 

Answer- S=Vt2

Que- SI unit of 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- Kg m-1.S-1

Que- Three students measured length of a needle with meter rod and recorded as :  (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is correct record? 

a. only (i) 

b. only (ii) 

c. only (iii) 

d. both (i) and (ii) 

Answer- only (iii)

Que- One light year is equal to  

a. 9.5x1015m 

b. 9.5x1015sec 

c. 9.5x1015Km 

d. 9.5x1015cm 

Answer- 9.5x1015m

Que- Absolute uncertainty in a measurement depends upon  

a. magnitude of the measurement 

b. least count of the instrument  

c. percentage error in the measurement 

d. all of a, b and c 

Answer- least count of the instrument 

Que- 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- solid angle 

Que- An ideal standard of measurement of a base quantity has characteristics  

a. accessible 

b. invariable 

c. transportable 

d. only a and b are correct 

Answer- only a and b are correct

Que- Total uncertainty, in result obtained from the subtraction of two measurement, is equal to  

a. sum of their absolute uncertainties 

b. difference of their absolute uncertainties 

c. product of their absolute uncertainties 

d. division of their absolute uncertainties 

Answer- sum of their absolute uncertainties

Que- Which one is the highest power multiple? 

a. giga  

b. beta 

c. mega 

d. deca 

Answer- giga 

Que- One pico stands for  

a. 10 raised to power -15 

b. 10 raised to power -12 

c. 10 raised to power -9 

d. 10 raised to power -6 

Answer- 10 raised to power -12

Que- Unit of G is? 

a. Nm2Kg2 

b. Nm2Kg 

c. Nm2Kg-2 

d. none  

Answer- Nm2Kg

Que- 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 

Answer- newton, N

Que- How many main frontiers of fundamental science? 

a. 1 

b. 2 

c. 3 

d. 4 

Answer- 3

Que- Which one is the derived quantity in SI units? 

a. electric current 

b. electric charge 

c. plane angle 

d. amount of substance 

Answer- electric charge

Que- Which one is the correct representation of the unit of pressure? 

a. Newton/Meter2 

b. newton/meter2 

c. Newton/meter2 

d. newton/Meter2 

Answer- newton/meter2

Que- Which one is the dimensionally correct equation? 

a. f=vt 

b. S=Vit+1/2at2 

c. V=St 

d. V=f/t 

Answer- S=Vit+1/2at2

Que- Zero error of the instrument is a type of  

a. random error 

b. personal error 

c. systematic error 

d. classified error 

Answer- systematic error

Que- In multiplication and division of measurement  

a. percentage uncertainties are added 

b. absolute uncertainties are added 

c. percentage uncertainties are divided 

d. absolute uncertainties are divided 

Answer- percentage uncertainties are added

Que- The number of significant figures in 5.400 are 

a. three 

b. five 

c. two 

d. none 

Answer- none

Que- To reduce the uncertainty in the timing experiment 

a. highly precise instrument 

b. conduct at room temperature 

c. count more number of vibration 

d. both a and c 

Answer- both a and c

Que- The unmber of significant figures in the length of a bar 6200mm measured by meter rod are 

a. four 

b. three 

c. two 

d. none of these 

Answer- four

Que- The number 76.85 is rounded off upto two significant figures as  

a. 76.8 

b. 77 

c. 76.9 

d. none of these 

Answer- 77

Que- Which of the following is not a correct representation method for prefixes 

a. 1mm 

b. 10km 

c. 1000um 

d. both (a) and (b) 

Answer- 1000um

Que- Rectangular coordinate system is also called  

a. polar coordinate system 

b. Cartesian coordinate system 

c. cylindrical coordinate system 

d. spherical coordinate system 

Answer- Cartesian coordinate system

Que- The direction of a vector in spece is specified by  

a. one angle 

b. two angle 

c. three angle 

d. no angle 

Answer- three angle

Que- Addition of vector obeys  

a. commutative law 

b. distributive law 

c. associative law 

d. all given laws in a , b and c 

Answer- all given laws in a , b and c

Que- A vector can be multiplied by a number. The number may be  

a. dimensionless 

b. dimensional scalar 

c. negative 

d. all a, b and c are correct 

Answer- all a, b and c are correct

Que- Unit vector n^ is along  

a. x-axis 

b. normal on a surface 

c. y-axis 

d. z-axis 

Answer- normal on a surface

Que- Maximum number of rectangular components are  

a. one   

b. two   

c. three   

d. infinite 

Answer- three  

Que- Maximum number of components of a vector may be  

a. one   

b. two   

c. three   

d. infinite 

Answer- infinite

Que- The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is  

a. 30 Degree 

b. 60 Degree 

c. 90 Degree 

d. 120 Degree 

Answer- 120 Degree

Que- What is the angle that the given vector makes with y-axis?    A=2 i^+??12 j^ 

a. 30 Degree 

b. 60 Degree 

c. 90 Degree 

d. 120 Degree 

Answer- 60 Degree

Que- In which quadrant the two rectangular components of a vector have same sign? 

a. 1st 

b. 2nd 

c. both 1st and 3rd 

d. 4th 

Answer- both 1st and 3rd

Que- Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then  

a. B is anti parallel to A 

b. B is negative vector of A 

c. B has negative magnitude  

d. B is perpendicular to A 

Answer- B is negative vector of A

Que- i^ . (j^ x k^) is equal to  

a. 1 

b. i^ 

c. j^ 

d. k^ 

Answer- 1

Que- The direction of vector product is given by  

a. head to tail rule 

b. right hand rule 

c. left hand rule 

d. triangular rule 

Answer- right hand rule

Que- If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has direction along  

a. west 

b. north 

c. down 

d. up 

Answer- down

Que- Null vector is a vector which has  

a. zero magnitude 

b. no specified direction 

c. both a and b are correct 

d. both a and b are not correct 

Answer- both a and b are correct

Que- Angle between two vectors A and B can be determined by   

a. their dot product 

b. their cross product 

c. head to tail rule 

d. right hand rule 

Answer- their dot product

Que- The magnitude of cross product is equal to the dot product between them.  The angle between the two vectors is  

a. 30 Degree 

b. 45 Degree 

c. 60 Degree 

d. 180 Degree 

Answer- 45 Degree

Que- Torque is defined as  

a. turning effect of force 

b. cross product of position vector and force 

c. product of force and moment arm 

d. all a, b and c are correct 

Answer- all a, b and c are correct

Que- The dimension of torque is  

a. [ML2T-2] 

b. [MLT-2] 

c. [ML2T] 

d. [ML-2T-2] 

Answer- [ML2T-2]

Que- SI unit of torque is   

a. N.m 

b. joule 

c. both a and b are correct 

d. neither a nor b is correct 

Answer- N.m

Que- Torque acting on a body determines  

a. acceleration 

b. linear acceleration 

c. angular acceleration 

d. direction of motion of the body 

Answer- angular acceleration

Que- A body in equilibrium  

a. always at rest  

b. always in uniform motion 

c. may be at rest or in uniform motion 

d. may be at rest or in motion 

Answer- may be at rest or in uniform motion

Que- A body will be in complete equilibrium when it is satisfying  

a. Ist condition of equilibrium 

b. 2nd condition of equilibrium 

c. both Ist and 2nd condition of equilibrium 

d. impossible 

Answer- both Ist and 2nd condition of equilibrium

Que- Which one is not a type of dynamic equilibrium? 

a. rotational equilibrium 

b. translational equilibrium 

c. static equilibrium 

d. both a and c are corret answer. 

Answer- static equilibrium

Que- Three coplanar forces acting on a body keep it in equilibrium. They should therefore be  

a. concurrent 

b. non concurrent 

c. parallel 

d. non parallel 

Answer- concurrent

Que- which of the following pairs does not have identical dimensions ? 

a. torque and energy 

b. momentum and impulse 

c. energy and work 

d. mass and moment of inertia 

Answer- mass and moment of inertia

Que- A central force is that which  

a. can produce torque 

b. can not produce torque 

c. some time can produce torque some time can not  

d. has no relation with torque 

Answer- can not produce torque

Que- It is easier to turn a steering wheel with both hands than with a single hand because  

a. accelerating force increases on the wheel 

b. two forces act on the wheel 

c. two hands provide firm grip 

d. couple acts on the wheel 

Answer- couple acts on the wheel

Que- The cross product i^ x j^ is equal to  

a. zero 

b. one 

c. i^ 

d. k^ 

Answer- k^

Que- The magnitude of i^. (j^ x k^) is  

a. 0 

b. 1 

c. -1 

d. i^ 

Answer- 1

Que- In which quadrant, only value of tan will be positive? 

a. first 

b. second 

c. third 

d. both 1st and 3rd 

Answer- both 1st and 3rd

Que- The cross product of two vectors is a negative vector when  

a. they are parallel vectors 

b. they are anti parallel vectors 

c. they are perpendicular vector 

d. they are rotated through 270? 

Answer- they are rotated through 270?

Que- When body is in motion, ________ always changes. 

a. its velocity 

b. its acceleration 

c. its position vector 

d. its momentum 

Answer- its position vector

Que- A body is moving with uniform velocity. Its  

a. speed changes 

b. acceleration changes 

c. direction of motion changes 

d. displacement from origin changes 

Answer- displacement from origin changes

Que- A man is in a car is moving with velocity of 36km/hr. His speed with repect to the car is  

a. 10m/s 

b. 36m/s 

c. zero 

d. infinite 

Answer- zero

Que- When velocity time graph is a straight line parallel to time axis then  

a. acceleration is const 

b. acceleration is variable  

c. acceleration is zero  

d. velocity is zero 

Answer- acceleration is zero 

Que- Area under velocity time graph represent  

a. force  

b. displacement 

c. distance 

d. acceleration 

Answer- distance

Que- Slope of velocity time graph is  

a. acceleration 

b. distance 

c. force 

d. momentum 

Answer- acceleration

Que- Instantaneous and average velocities become equal when body  

a. has zero acceleration 

b. has uniform acceleration 

c. has variable acceleration 

d. moves in a circle 

Answer- has zero acceleration

Que- Which law of motion is also called law of inertia? 

a. 1st law 

b. 2nd law 

c. 3rd law  

d. all 1st, 2nd and 3rd laws 

Answer- 1st law

Que- Inertia of an object is quantitative measure of its  

a. volume 

b. density 

c. mass 

d. temperature 

Answer- mass

Que- Newtons laws do not hold good for particles  

a. at rest 

b. moving slowly 

c. move with high velocity 

d. move with velocity comparable to velocity of light 

Answer- move with velocity comparable to velocity of light

Que- 1st law of motion gives the definition of  

a. rest 

b. motion 

c. velocity 

d. force 

Answer- force

Que- 2nd law of motion gives the definition of  

a. force  

b. acceleration 

c. velocity 

d. both force and acceleration 

Answer- acceleration

Que- 3rd law of motion explains  

a. effect of force 

b. existence of a force 

c. existence of two forces 

d. existence of pair of forces in nature 

Answer- existence of pair of forces in nature

Que- Momentum depends upon  

a. force acts on the body 

b. mass of the body 

c. velocity of the body 

d. both mass and velocity of the body 

Answer- both mass and velocity of the body

Que- The dimension of force is  

a. MLT-2 

b. ML2T-2 

c. ML2T2 

d. ML-2T-2 

Answer- MLT-2

Que- When a body moves in a straight line then its displacement coincides with 

a. distance 

b. force 

c. acceleration is zero  

d. both (a) and (b) 

Answer- distance

Que- Which of the following pair has same direction always? 

a. force, displacement 

b. force, velocity 

c. force, acceleration 

d. force, momentum 

Answer- force, acceleration

Que- Motorcycle safety helmet extends the time of collision hence decreasing the  

a. chance of collision 

b. force acting 

c. velocity 

d. impulse 

Answer- impulse

Que- The collision between two bodies be elastic if bodies are  

a. solid and soft 

b. soft and elastic 

c. solid and hard 

d. hard and elastic 

Answer- solid and hard

Que- During long jump, athlete runs before taking the jump. By doing so he  

a. provide him a larger inertia 

b. decreases his inertia 

c. decreases his momentum 

d. increases his momentum 

Answer- increases his momentum

Que- When car takes turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to  

a. centripetal force 

b. gravitational force 

c. their inertia 

d. centrifugal force 

Answer- their inertia

Que- A body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g=10? 

a. 14 m 

b. 20 m 

c. 5 m 

d. 25 m 

Answer- 14 m

Que- What is the shape of velocity, time graph for constant acceleration? 

a. straight inclined line. 

b. parabola  

c. inclined curve 

d. declined curve 

Answer- straight inclined line.

Que- When collision between the bodies in a system is inelastic in nature then for system  

a. momentum changes but K.E remain conserve 

b. K.E changes but momentum remain conserve 

c. both momentum and K.E changes 

d. both momentum and K.E remain conserve 

Answer- K.E changes but momentum remain conserve

Que- Which shows the correct relation between time of flight T and maximum height H? 

a. H=gT2/8 

b. H=8T2/g 

c. H=8g/T2 

d. H=gT2 

Answer- H=gT2/8

Que- The acceleration in the rocket at any instant is proportional to the nth power of the velocity of the expelled gases. Where the value of n must be? 

a. -1 

b. 1 

c. 2 

d. -2 

Answer- 1

Que- Taking off rocket can be explained by  

a. 1st law of motion 

b. 2nd law of motion 

c. Law of conservation of momentum 

d. law of conservation of energy 

Answer- Law of conservation of momentum

Que- Which of the following is not an example of projectile motion. 

a. a gas filled ballon 

b. bullet fired from gun 

c. a football kicked 

d. a base ball shot 

Answer- a gas filled ballon

Previous Post Next Post