Physics set 1 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 448 questions
Q.241 How does the viscosity of liquids and gases change with an increase in temperature?
A increases for both
B decreases for both
C decreases for liquids and increases for gases
D increases for liquids and decreases for gases
Discuss / Board
Q.242 If a planet has twice the mass and twice the radius of Earth, its escape velocity will be:
A same as earth
B twice that of earth
C half that of earth
D four times that of earth
Discuss / Board
Q.243 Which of the following statements about kinetic and static friction is true?
A kinetic friction is greater than limiting static friction
B kinetic friction is less than limiting static friction
C they are always equal
D kinetic friction depends on contact area
Discuss / Board
Q.244 A passenger in a moving train tosses a coin upward which falls behind him. This indicates the train is:
A accelerating
B decelerating
C moving with uniform speed
D moving in a circular path
Discuss / Board
Q.245 Banking of roads at curves is primarily designed to provide necessary:
A centrifugal force
B centripetal force
C frictional force
D gravitational pull
Discuss / Board
Q.246 The inertia of an object is a direct measure of its:
A velocity
B volume
C mass
D density
Discuss / Board
Q.247 When a bullet is fired from a rifle, how does the kinetic energy of the rifle compare to the bullet?
A it is greater than the bullet
B it is equal to the bullet
C it is less than the bullet
D it is zero
Discuss / Board
Q.248 Assertion: A machine cannot have an efficiency of 100%. Reason: Some energy is always lost to overcome friction.
A both assertion and reason are true, reason explains assertion
B both assertion and reason are true, reason does not explain assertion
C assertion is true but reason is false
D assertion is false but reason is true
Discuss / Board
Q.249 If a spring of stiffness k is cut into two equal halves, what is the stiffness constant of each half?
A k/2
B k
C 2k
D 4k
Discuss / Board
Q.250 A body is floating in water with half its volume submerged. What is the specific gravity of the body?
A 0.5
B 1.0
C 1.5
D 2.0
Discuss / Board
Q.251 What happens to the boiling point of water when it is heated at a high altitude?
A it increases
B it decreases
C it remains 100 degrees celsius
D it fluctuates
Discuss / Board
Q.252 At what temperature does pure water attain its maximum density?
A 0 degree celsius
B 4 degrees celsius
C 100 degrees celsius
D minus 4 degrees celsius
Discuss / Board
Q.253 Which thermodynamic process occurs at a constant temperature?
A isobaric process
B isochoric process
C isothermal process
D adiabatic process
Discuss / Board
Q.254 A perfect black body is best described as an object that:
A absorbs all radiation incident on it
B reflects all radiation incident on it
C transmits all radiation incident on it
D emits only visible light
Discuss / Board
Q.255 The pitch of a sound wave is primarily determined by its:
A amplitude
B frequency
C wavelength
D velocity
Discuss / Board
Q.256 An echo is heard distinctly only if the reflecting surface is at a minimum distance of approximately:
A 10 meters
B 17 meters
C 25 meters
D 34 meters
Discuss / Board
Q.257 Which phenomenon proves that light waves are transverse in nature?
A interference
B diffraction
C polarization
D refraction
Discuss / Board
Q.258 Total internal reflection can only occur when light travels from a:
A rarer to a denser medium
B denser to a rarer medium
C vacuum to a glass medium
D medium of any optical density to another
Discuss / Board
Q.259 A mirage in a desert is an optical illusion caused by which phenomenon?
A dispersion of light
B scattering of light
C total internal reflection
D diffraction of light
Discuss / Board
Q.260 The blue color of the clear sky is primarily due to the:
A reflection of ocean water
B dispersion of sunlight
C scattering of light by the atmosphere
D absorption of red light by ozone
Discuss / Board
Q.261 Two copper wires A and B have the same length, but the radius of A is twice that of B. The ratio of their resistance Ra to Rb is:
A 1:2
B 2:1
C 1:4
D 4:1
Discuss / Board
Q.262 What is the internal resistance of an ideal voltmeter?
A zero
B very low
C infinite
D equal to the circuit resistance
Discuss / Board
Q.263 In a series electrical circuit composed of different resistors, which physical quantity remains constant across all of them?
A voltage
B current
C power
D energy
Discuss / Board
Q.264 One kilowatt-hour, the commercial unit of electrical energy, is equal to how many joules?
A 3.6 times 10 to the power 5 joules
B 3.6 times 10 to the power 6 joules
C 36 times 10 to the power 6 joules
D 3.6 times 10 to the power 4 joules
Discuss / Board
Q.265 A transformer is used to step up or step down AC voltages. It operates on the principle of:
A self induction
B mutual induction
C electromagnetic radiation
D magnetic resonance
Discuss / Board
Q.266 The magnetic field lines inside a long, straight, current-carrying solenoid are:
A circular
B elliptical
C parallel and straight
D converging at the center
Discuss / Board
Q.267 Which atomic particle is identical to a beta particle emitted during radioactive decay?
A proton
B neutron
C electron
D helium nucleus
Discuss / Board
Q.268 The half-life of a radioactive substance relies heavily on which of the following factors?
A initial mass of the substance
B temperature of the environment
C pressure of the surroundings
D nature of the substance
Discuss / Board
Q.269 The massive amount of solar energy generated in the sun is a result of:
A nuclear fission
B nuclear fusion
C chemical combustion
D gravitational contraction
Discuss / Board
Q.270 The photoelectric effect provides conclusive experimental evidence for the:
A wave nature of light
B particle nature of light
C electromagnetic nature of light
D transverse nature of light
Discuss / Board

Master Physics set 1 for All Competitive Exams 2026

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