Explore topic-wise MCQs in Physics.

This section includes 1341 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

251.

A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of

A. 18 m/s
B. 25 m/s
C. 30 m/s
D. 36 m/s
Answer» D. 36 m/s
252.

Which of the following is a Non Renewable Resource of Energy?

A. Wind power
B. Hydrogen fuel
C. Natural gas
D. Solar energy
Answer» D. Solar energy
253.

Which of the following is Not a form of Energy?

A. Heat
B. Sound
C. Motion
D. Pressure
Answer» E.
254.

How many laws of physics are there?

A. 5
B. 4
C. 3
D. 2
Answer» D. 2
255.

What is refractive index ?

A. It is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
B. It is defined as the product of speed of light in medium and in vacuum.
C. It is defined as the ratio of speed of light in vacuum to the speed of light in the medium .
D. None of above
Answer» D. None of above
256.

Scalar Quantities are

A. Physical quantities which have magnitude only and no direction
B. Physical quantities which have no magnitude only and only direction
C. Physical quantities which have magnitude only and direction
D. Physical quantities which have no magnitude and no direction
Answer» B. Physical quantities which have no magnitude only and only direction
257.

For accurate scientific work, temperatures are often measured by

A. Mercury thermometers
B. Alcohol thermometers
C. Platinum resistance thermometers
D. Thermoelectric thermometers
Answer» D. Thermoelectric thermometers
258.

A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because

A. The floor and carpet are at different temperatures
B. The stone conveys the heat away from the feet more rapidly than the carpet
C. The carpet is a better conductor of heat than the stone
D. The human body maintains a constant temperature
Answer» C. The carpet is a better conductor of heat than the stone
259.

A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point the rifle

A. At the lower alevation than the bird
B. At a higher alevation than the bird
C. In the same direction as the bird
D. Vertically upwards
Answer» C. In the same direction as the bird
260.

In the case of bodies falling under gravity which of the following remains constant at a given place?

A. Kinetic energy
B. Potential energy
C. Acceleration
D. All the above
Answer» D. All the above
261.

A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the the bucket. The reading of the spring balance

A. Will increase
B. Will decrease
C. Does not change
D. Varies with the increase of depth of the immersion of the iron piece
Answer» B. Will decrease
262.

Frictional force acts in

A. The same direction as the motion
B. The opposite direction of the motion
C. All the directions
D. Upward direction
Answer» C. All the directions
263.

Solids have definite shapes.This is because

A. The forces of cohesion of the molecules within are very much less in them
B. The forces of cohesion are very large
C. The forces of adhesion are large
D. The forces of adhesion are less
Answer» C. The forces of adhesion are large
264.

A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will

A. Remain straight
B. Bend towards right
C. Bend towards left
D. None of these
Answer» D. None of these
265.

Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.

A. Rough white
B. Rough black
C. Shining white
D. Shining black
Answer» C. Shining white
266.

When a bullet is fired from a gun

A. The gun moves forward
B. The gun jumps up
C. The gun does not move
D. The gun recoils with the same momentum as the bullet
Answer» E.
267.

The electrical domestic tube light gives white fluorescent light because of

A. Colision between molecules of filled gas under electric current
B. Heavy current
C. Vacuum inside the tube
D. Falling of ultra violet rays on the white inner coating of the tube
Answer» E.
268.

Two bulbs are fitted in a room in the domestic electric installation. One of them glows brighter than the other. Then

A. The brighter bulb has smaller resistance
B. The brighter bulb has larger resistance
C. Both the bulbs have the same resistance
D. None of these
Answer» B. The brighter bulb has larger resistance
269.

Radio waves sent out by a radio stations are reflected by

A. Troposphere
B. Stratosphere
C. Mesosphere
D. Ionosphere
Answer» E.
270.

No current will flow between two charged bodies if they have the same

A. Resistance
B. Charge
C. Potential
D. Charge/ potential ratio
Answer» D. Charge/ potential ratio
271.

A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be

A. A parabola
B. A horizontal straight line
C. A vertical straight line
D. A circle
Answer» B. A horizontal straight line
272.

A series of fast moving still pictures can be made to appear as a moving picture because the eye

A. Can focus very rapidly as pictures change
B. Is quicker than the brain
C. Can see 2 images separated only if the interval betwen seeing them is more than one-tenth of a second
D. Can shut out some of the light
Answer» D. Can shut out some of the light
273.

A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is

A. Greater than the weight of the man
B. Less than the weight of the man
C. Same as the weight of the man
D. Zero
Answer» B. Less than the weight of the man
274.

Fat can be seperated from milk in a cream seperator because of :

A. Cohesive force
B. Gravitational force
C. Centripetal force
D. Centrifugal force
Answer» E.
275.

Which one of the following groups have quantities that do not have the same dimensions

A. Pressure, stress
B. Velocity, speed
C. Force, impulse
D. Work, energy
Answer» D. Work, energy
276.

The cover of a solar coker is made of glass because

A. It absorbs sun's rays
B. It reflects sun's rays
C. It retains the heat inside by the green house effect
D. It rediates heat better than metals
Answer» D. It rediates heat better than metals
277.

In case of uniform circular motion, the acceleration is

A. Variable in magnitude but constant in direction
B. Constant in magnitude and directed radially inwards
C. Variable in magnitude but tangential to the circle
D. Zero
Answer» B. Constant in magnitude and directed radially inwards
278.

Max well is the unit of

A. Intensity of magnetization
B. Permeability
C. Magnetic flux
D. Magnetic susceptibility
Answer» D. Magnetic susceptibility
279.

Heat energy of an object is

A. The average energy of the molecules of the object
B. The total energy of the molecules of the object
C. The average velocity of the molecules of the object
D. The average potential energy of the molecules of the object
Answer» C. The average velocity of the molecules of the object
280.

An object with a constant speed

A. Is not accelerated
B. Might be accelerated
C. Is always accelerated
D. Also has a constant velocity
Answer» C. Is always accelerated
281.

Why does the sea appear blue in colour?

A. Reflection of the sun light from water surface
B. Interference of the sun light from water surface
C. Scattering of the sunlight by water molecules
D. Refraction of the sun light
Answer» D. Refraction of the sun light
282.

When a ray of light is refracted by a prism such that the angle of deviation is minimum then

A. The angle of emergence is equal to the angle of incidence
B. The angle of emergence is greater than the angle of incidence
C. The angle of emergence is smaller than the angle of incidence
D. The sum of the angle of incidence and the angle of emergence is equal to 90 degrees
Answer» B. The angle of emergence is greater than the angle of incidence
283.

Decibel is the unit of

A. Speed of light
B. Intensity of sound
C. Intensity of heat
D. None of these
Answer» C. Intensity of heat
284.

What are the particles emitted by radio active element after 3 consequtive disintegrations?

A. 2 alpha 1 beta
B. 1 alpha 1 beta
C. 2 beta 1 alpha
D. 2 beta 2 alpha
Answer» D. 2 beta 2 alpha
285.

In the electrical circuit of a house, the fuse acts as

A. A load
B. A thermopile
C. A safety device
D. A step down device
Answer» D. A step down device
286.

A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan

A. Increases
B. Decreases
C. Remains the same
D. First increases and then decreases
Answer» D. First increases and then decreases
287.

Which of the following group of elements are diamagnetic ?

A. Argon, copper, silver
B. Hydrogen, argon, copper
C. Oxygen, copper, silver
D. Hydrogen, oxygen, argon
Answer» B. Hydrogen, argon, copper
288.

If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to _____ ?

A. 300 m
B. 30 m
C. 3 m
D. 0.3 m
Answer» B. 30 m
289.

Which law is also called law of inertia ?

A. Newton first law
B. Newton second law
C. Newton third law
D. All of above
Answer» B. Newton second law
290.

The image of an object formed on the retina of the eye is

A. Virtual and upright
B. Virtual and inverted
C. Real and inverted
D. Real and upright
Answer» D. Real and upright
291.

Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days

A. The pores in the pot are closed
B. Rain water stops oozing out from the pores
C. The water that oozes out does not evaporate quickely because of the large percent age of moisture in the air
D. Surface of the pot becomes damp
Answer» D. Surface of the pot becomes damp
292.

A ball is thrown vertically upwards. Assuming the air resistance to be constant and cosiderable:

A. The time of ascent < the time of descent
B. The time of ascent > the time of descent
C. The time of ascent = the time of descent
D. None of these
Answer» B. The time of ascent > the time of descent
293.

Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be

A. 2
B. 6
C. 5
D. 3
Answer» C. 5
294.

Which of the following physical quantities have the same dimensions

A. Momentum and impulse
B. Power and young modulus
C. Energy and angular momentum
D. Force constant and moment of inertia
Answer» B. Power and young modulus
295.

A convex mirror is used to form an image of a real object. The image

A. Is diminished in size
B. Is erect
C. Always lies between the pole and the focus
D. All of the above
Answer» E.
296.

Total internal reflection can take place when light travels from

A. Air to glass
B. Air to water
C. Water to glass
D. Diamond to glass
Answer» E.
297.

What causes clouds to float in the atmosphere?

A. pressure
B. density
C. heat
D. Speed
Answer» C. heat
298.

How is the Sun's energy produced?

A. by oxidation
B. By nuclear fission
C. by ionization
D. by nuclear fusion
Answer» E.
299.

What will remain unchanged if the quantity of the commodity changes?

A. volume
B. density
C. mass
D. burden
Answer» C. mass
300.

Archimedes' law is related to which of the following?

A. law of gravity
B. right angled triangle rule
C. flotation law
D. none of these
Answer» D. none of these