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