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WorksheetsLevel Up SP015 Lecture 1920
Total questions: 78
Worksheet time: 39mins
Which of the following is the systematic error?
Error due to wrong position of eyes when taking measurement.
Error due to curved meter rule.
Error due to the mistakes of observer.
Parallax error.
What is Q, if a slope of a Q versus time graph represents the velocity?
Impulse.
Potential energy.
Velocity
Displacement.
Which of the following statements is TRUE about increasing positive velocity-time graph of an object?
The area under the graph is instantaneous velocity of the object.
The gradient of the graph is the displacement of the object.
The gradient of the graph is the instantaneous acceleration of the object.
The area under the graph is the average acceleration of the object.
A ball is thrown vertically upward from ground. If it achieves maximum height H, then its vertical velocity is
more than initial vertical velocity.
more than initial horizontal velocity.
zero.
same as final velocity.
Which is the following TRUE about inelastic collision?
Both total momentum and total kinetic energy are conserved.
Total kinetic energy is conserved but total momentum is not.
Total momentum is conserved but total kinetic energy is not.
Both total momentum and total kinetic energy is not conserved.
State of equilibrium is when
there is no opposing force.
there is no force acting on an object.
the object is moving in uniform speed.
B and C both.
Force that always opposes motion between two surfaces in contact is termed as
weight.
friction.
resistance.
tension.
A compressed spring possesses
Kinetic Energy.
Elastic Potential Energy.
Gravitational Potential Energy.
Sound Energy.
We can say that one watt is defined as
rate of work done or energy conversion of one joule per second.
rate of time of one second per joule.
rate of distance of one meter per joule.
rate of work done or energy conversion of one joule per meter.
Work can only be done when there is
force.
power.
energy changes.
efficiency.
Centripetal force has same direction as the
centripetal velocity.
centripetal acceleration.
angular acceleration.
angular speed.
A body is moving along a circular path with variable speed. It has
a radial acceleration.
a tangential acceleration.
zero acceleration.
both tangential and radial accelerations.
The acceleration due to gravity is zero at
sea level.
the equator.
poles.
the centre of the earth.
A feather and a coin released simultaneously from the same height do not reach the ground at the same time because of the
resistance of the air.
force of gravitation.
force of gravity.
difference in mass.
Law of conservation of angular momentum is mostly used in
diving.
ice-skating.
driving.
both A and B.
At pivot point, body with mass 'm' will have a torque by the
force.
circle.
central point.
radius of the circle.
Which of the following is the example of simple harmonic motion?
Car shock absorber system
Bouncing ball on the floor with decreasing height
Mass attached on a spring moving back and forth horizontally on a surface with the presence of friction
Marble that is free to roll inside a frictionless hemispherical bowl
K=21mω2(A2−y2) The variation of kinetic energy against the displacement is described by the above equation. Which of the following statement is TRUE?
The kinetic energy is always positive.
Kinetic energy of the SHM is increased linearly with displacement.
Kinetic energy is maximum when the object is at maximum displacement.
Kinetic energy is constant throughout the motion.
What are the essential properties a medium must possess for the propagation of mechanical waves?
Stable pressure
Maximum friction
Constant temperature
Minimum friction
What is the most fundamental property of wave?
Temperature
Pressure
Frequency
Wavelength
The apparent frequency in Doppler’s effect does not depend upon
Speed of the observer.
Distance between the observer and source.
Speed of the source.
Frequency of the source.
What type of waves are Sound Waves?
Latitudinal waves
Logitudinal waves
Latitudinal mechanical waves
Longitudinal waves
Which of the following statement is or are correct about longitudinal mechanical waves?
The longitudinal mechanical waves which lie in the frequency range 20 Hz to 20000 Hz are called audible or sound waves.
The longitudinal mechanical waves having frequencies less than 20 Hz are called infrasonic.
The longitudinal mechanical waves having frequencies greater than 20,000 Hz are called ultrasonic waves.
All of the above are correct.
A force F stretching a wire produces an extension x. The energy stored in the stretched wire is (1/2)Fx only if
the proportionality limit is exceeded.
the extension is directly proportional to the force.
the cross-sectional area of the wire remains unchanged.
the weight of the wire is negligible.
Which one of the following quantities does not have the unit of force per unit area
Stress
Strain
Pressure
Young’s modulus
Stress is defined as
the ratio of extension (elongation), e (Δl) to length, l0.
the ratio of pressure to time.
the ratio of the perpendicular force to the cross-sectional area.
measure of how strong a material is.
The following statements are true about strain EXCEPT
it is measure of how much an object is being stretched.
it is the ratio of extension to original length.
it is the ratio of the perpendicular for to the cross-sectional area
it has no unit.
Stress to strain ratio is equivalent to
elastic deformation.
plastic deformation.
Young’s modulus.
force constant.
A copper wire has reached its elastic limit. It means that
If any further stress is applied, the wire will break.
If any further stress is applied, the deformation of the wire will not be reversible.
The deformation no longer obeys Hooke’s Law.
The wire will continue deforming with no additional stress.
Most metals are good conductor of heat because of
transport of energy.
free electrons and frequent collision of atoms.
lattice defects.
capacity to absorb energy.
The heat energy propagation due to conduction heat transfer will be minimum for
lead.
water.
air.
copper.
On which factor does the average kinetic energy of gas molecules depend?
Nature of the gas.
Temperature.
Volume.
Mass.
A gas behaves as an ideal gas at
low pressure and high temperature.
low pressure and low temperature.
high pressure and low temperature.
high pressure and high temperature.
The degree of freedom of a polyatomic gas is
1
2
6
8
The speed of three gas molecules is originally of same value. The rms speed of the molecules is the
sum of the original speed of three gas molecules.
square of sum of the original speed of three gas molecules.
half of the original speed of one gas molecules.
original speed of one gas molecules.
Which of the following is true about the first law of thermodynamic?
Another form of conservation of energy.
The heat exchange is equal to the sum of the internal energy of the system with work done.
The work done in any of the thermodynamic process can be calculated from the are under curve of P-t graph.
The law is only valid for the process of gas expansion.
Gas in a container has an increase in the pressure from 1 atm to 3 atm, if the volume of the gas is kept constant, which of the following is true about the process
It is an isobaric process.
The work done of the gas is zero.
The temperature of the gas decreases.
There is no change in the internal energy of the gas.
In an isothermal expansion
The total kinetic energy of the gas increases.
The temperature of the gas increases due to the increased in volume.
No heat exchange in the system.
No change in the internal energy of the gas.
Which of the following statements is NOT TRUE about length and displacement?
Length is a base quantity.
Length has magnitude and direction.
Displacement has magnitude and direction.
Both quantity has the same S.I. unit.
Average velocity is defined as
The rate of change of displacement.
The change of displacement with respect to time.
Displacement moved per unit time.
All the above.
On a displacement-time graph, the steeper the line
the faster the motion
the longer the time
the further the distance
the slower the motion
Which of the following is TRUE for an object in a projectile motion with initial velocity, u and angle.
The horizontal component of velocity is zero at the highest point of its flight.
The horizontal component of acceleration is 9.81 ms-2.
The vertical component of velocity is zero at the highest point of its flight.
The vertical component of acceleration is 9.81 ms-1.
Impulse is defined as
the product of an object mass and velocity.
the change in the momentum of the object.
the total momentum is constant.
the total kinetic energy is constant.
If an object flies into space, its
mass and weight both would remain same
mass would change but weight would remain same
mass would remain same but weight would change
mass and weight both would change
If two forces of 3 N acting on an object in opposite direction. Resultant force will be
6 N
3 N
9 N
Zero
Potential energy and kinetic energy are types of
Electrical energy
Magnetic energy
Thermal energy
Mechanical energy
In order to do work, energy is
transferred or converted
used up
lost
lost or transferred
In symbols, one watt is equal to
1 J s-1
1 s J-1
1 m J-1
1 J m-1
Curved flights at high speed requires centripetal force that is
small
zero
large
maximum
A car moving on a horizontal road may be thrown out of the road is taking a turn
by the gravitational force
due to the lack of proper centripetal force
due to the lack of frictional force between the tire and the road
due to the reaction of the ground
The period of geostationary artificial satellite of earth is
6 hours
12 hours
24 hours
365 days
If the radius of the earth were to shrink by one percent, its mass remaining the same, the acceleration due to gravity on the earth’s surface would
decrease
remains unchanged
increase
none of these
Angular displacement is defined by units
revolution
radian
radian per second
both A and B
Rate at which angular velocity changes with time is called
angular displacement
angular velocity
angular acceleration
angular speed
Law of conservation of angular momentum is mostly used in
sleeping
ice-skating
driving
eating
Particle executing S.H.M the variation of the acceleration of the particles as a function of the displacement of the particle from equilibrium position follow
straight line
curve
ellipses
hyperbola
A particle oscillate between point and , where O is the equilibrium position. Which of the following shows the variation of potential energy of a S.H.M with the displacement from equilibrium?
A sound wave is different than a light wave in that a sound wave is
produced by an oscillating object and a light wave is not.
not capable of traveling through a vacuum.
not capable of diffracting and a light wave is.
capable of existing with a variety of frequencies and a light wave has a single frequency.
A transverse wave is transporting energy from east to west. The particles of the medium will move
east to west only
both eastward and westward
north to south only
both northward and southward
A wave is transporting energy from left to right. The particles of the medium are moving back and forth in a leftward and rightward direction. This type of wave is known as
mechanical
transverse
electromagnetic
longitudinal
A sound wave is a mechanical wave, not an electromagnetic wave. This means that
particles of the medium move perpendicular to the direction of energy transport.
a sound waves transports its energy through a vacuum.
particles of the medium regularly and repeatedly oscillate about their rest position.
a medium is required in order for sound waves to transport energy.
Which of the following is NOT a characteristic of mechanical waves?
They consist of disturbances or oscillations of a medium.
They transport energy.
They travel in a direction that is at right angles to the direction of the particles of the medium.
They are created by a vibrating source.
In Doppler effect change in frequency depends on
distance between source and listener
speeds of source and listener
density of air
half of distance between source and listener
When strain is produced in a body within elastic limit, its internal energy
remains constant
decreases
increases
none of the above
FIGURE 1 shows force against extension of a metal. The part in which Hooke's law holds good is
OA
AB
BC
CD
Point C in FIGURE 1 indicates
Breaking point
Limiting point
Yield point
Ultimate tensile strength
The unit of Young's modulus is
Nm-1
kgcm-1
kg
kgm-1s-2
Below are examples of plastic deformation, EXCEPT
a wire coiled 10 times around a magnetic core
broken glass
bent nail in wood
molded clay
The maximum attainable stress for a metal is called
yield stress
fracture stress
maximum stress
ultimate tensile stress
The thermal conductivity of a metal increases significantly as the temperature increase. This is due to
The slower lattice vibrations
The increasing distance between the atoms
The increase in the rate of collision between the atoms and conduction electrons.
The weaker intermolecular forces
The change in length of a rod when heated does not depend on
Type of material
Mass of the rod
Initial length of the rod
Change in temperature
Two types of gas molecules have the same mean translational kinetic energy if
The gas molecules absorb energy at the same rate.
The gas molecules have the same number of molecules.
The gas molecules have the same absolute temperature.
The gas molecules occupy equal volumes.
The pressure of a fixed mass of gas at constant volume is greater at a higher temperature because
The distance between the molecules increase.
The energy transferred to the walls during collisions increase.
The molecules collide with the walls of the container more frequently.
The intermolecular forces increase.
Which of the following is NOT valid assumption of the kinetic theory of gasses?
The gas molecules are constantly in free and random motion
The time between collisions of the molecules is negligible compared with the time of collision between molecules
The collisions between the gas molecules with each other and the walls are elastic.
The forces between molecules are negligible except during collisions.
The degree of freedom of a gas molecule depends on
The mass of the molecule and the temperature of the gas
The number of atoms per molecule and the temperature of the gas.
The rms speed of the molecule and the pressure of the gas.
The mass of the molecule and the pressure of the gas.
A gas is kept is cylinder and kept in a vacuum so that there is no heat exchange in the gas. If work is done on the gas , the temperature of the gas will __________.
remain the same
increase
decrease
becomes zero
A gas system undergoes a change in which the work done by the system is equal to its decrease in the internal energy of the system. This describe a process of
Isothermal
Adiabatic
Isovolumetric
Isobaric
When heat is given in an isobaric process, which of the following statements is TRUE?
I The work is done by the gas
II The internal energy of the gas increases
I
I and II
II
None
