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.361 The working principle of an optical fiber is based on which of the following phenomena?
A total internal reflection
B diffraction of light
C scattering of light
D refraction with dispersion
Discuss / Board
Q.362 Two metallic spheres of the same mass are heated to the same temperature and then left in the same surroundings. If sphere X is painted black and sphere Y is polished, which of the following is true?
A sphere y will cool faster
B sphere x will cool faster
C both will cool at the same rate
D cooling depends on the density of the metal
Discuss / Board
Q.363 A liquid is kept in a thermos flask. If the flask is vigorously shaken, the temperature of the liquid will:
A increase
B decrease
C remain the same
D decrease then increase
Discuss / Board
Q.364 Which physical quantity is conserved when a planet revolves around the Sun in an elliptical orbit?
A linear speed
B kinetic energy
C angular momentum
D linear momentum
Discuss / Board
Q.365 The focal length of a convex lens is 25 cm. Its power in diopters is:
A +4
B -4
C +0.04
D -0.04
Discuss / Board
Q.366 A balloon filled with helium rises in the air because:
A air exerts an upward force on the balloon
B the density of helium is less than the density of air
C helium is a noble gas
D the weight of the balloon is less than the buoyant force
Discuss / Board
Q.367 A fuse wire used in electrical circuits is made of an alloy that has:
A high resistance and high melting point
B low resistance and low melting point
C high resistance and low melting point
D low resistance and high melting point
Discuss / Board
Q.368 The recoil of a gun after firing a bullet is a direct application of:
A newtons first law of motion
B conservation of angular momentum
C newtons third law of motion
D the law of inertia
Discuss / Board
Q.369 A transformer is used to:
A convert dc to ac
B convert ac to dc
C step up or step down dc voltage
D step up or step down ac voltage
Discuss / Board
Q.370 The sky appears blue because of the:
A scattering of light by dust and air molecules
B reflection of light by the ocean
C refraction of light by the atmosphere
D dispersion of light through water droplets
Discuss / Board
Q.371 In a vacuum, if a feather and an iron ball are dropped from the same height simultaneously, which will reach the ground first?
A the iron ball
B the feather
C both will reach at the same time
D depends on the atmospheric pressure
Discuss / Board
Q.372 A convex mirror is commonly used as a rear-view mirror in vehicles because:
A it produces a real and inverted image
B it has a wider field of view than a plane mirror
C it produces a magnified image
D it is cheaper to manufacture
Discuss / Board
Q.373 The escape velocity on the surface of the Earth is approximately:
A 9.8 km/s
B 11.2 km/s
C 7.9 km/s
D 1.12 km/s
Discuss / Board
Q.374 Which of the following determines the pitch of a sound wave?
A amplitude
B frequency
C velocity
D loudness
Discuss / Board
Q.375 X-rays are which type of waves?
A longitudinal mechanical waves
B transverse electromagnetic waves
C matter waves
D stationary waves
Discuss / Board
Q.376 When a bar magnet is cut into two equal halves along its length, the pole strength of each piece:
A becomes double
B becomes half
C remains the same
D becomes zero
Discuss / Board
Q.377 The phenomenon of electromagnetic induction was discovered by:
A james clerk maxwell
B michael faraday
C heinrich hertz
D isaac newton
Discuss / Board
Q.378 An object is placed at the center of curvature of a concave mirror. The image formed will be:
A virtual and erect
B real and of the same size
C real and magnified
D virtual and diminished
Discuss / Board
Q.379 If the length of a simple pendulum is quadrupled, its time period will:
A be doubled
B be halved
C remain the same
D increase by four times
Discuss / Board
Q.380 Which of the following is an example of a scalar quantity?
A displacement
B velocity
C force
D electric potential
Discuss / Board
Q.381 Bernoulli's theorem is based on the law of conservation of:
A mass
B momentum
C energy
D angular momentum
Discuss / Board
Q.382 If an object is placed between two parallel plane mirrors, the number of images formed will be:
A two
B four
C zero
D infinite
Discuss / Board
Q.383 A body is in static equilibrium when the net:
A force acting on it is zero
B torque acting on it is zero
C force and net torque are both zero
D velocity is constant
Discuss / Board
Q.384 The speed of sound in air increases with an increase in:
A pressure
B temperature
C density
D wavelength
Discuss / Board
Q.385 The time period of a satellite revolving very close to the Earth's surface is approximately:
A 24 hours
B 84 minutes
C 60 minutes
D 48 hours
Discuss / Board
Q.386 The mass of a body is different from its weight because:
A mass is a variable quantity
B weight is a constant quantity
C mass is a scalar and weight is a vector quantity
D mass depends on gravity
Discuss / Board
Q.387 Oil rises up the wick in a lamp due to:
A viscosity of oil
B capillary action
C surface tension
D pressure difference
Discuss / Board
Q.388 The working of a rocket is based on:
A keplers laws
B newtons law of gravitation
C newtons third law of motion
D archimedes principle
Discuss / Board
Q.389 The energy stored in a stretched spring is:
A kinetic energy
B chemical energy
C potential energy
D electrical energy
Discuss / Board
Q.390 Which of the following is used in a solar cooker to trap heat?
A plane mirror
B convex lens
C glass sheet
D concave lens
Discuss / Board

Master Physics set 1 for All Competitive Exams 2026

Practicing Physics set 1 MCQs is one of the most effective ways to prepare for competitive examinations in 2026. This topic-wise question bank contains carefully selected multiple-choice questions designed to strengthen conceptual understanding, improve accuracy, and enhance problem-solving speed. Our collection includes beginner, intermediate, and advanced-level questions frequently asked in JKSSB, SSC, Banking, Railway, Police, Defence, State PSC, and various national-level examinations. Every question is structured to reflect real exam patterns and helps candidates become familiar with objective-type assessment formats. Instant answer verification enables students to identify mistakes immediately and learn the correct approach without wasting valuable preparation time. Regular practice of topic-wise MCQs improves retention, reinforces key concepts, and develops confidence required to perform well under exam pressure. Whether you are revising important concepts, preparing for an upcoming recruitment test, or strengthening weak areas, these practice questions provide a reliable platform for continuous improvement. Consistent participation in MCQ-based learning sessions can significantly increase your chances of achieving higher scores and better ranks in competitive examinations.

For additional MCQs, detailed explanations, and exam discussions, visit Ask JK Exam Library , our dedicated question-and-answer platform for competitive exam aspirants.

Frequently Asked Questions

Select individual options to trigger real-time validation matrix hooks. This evaluates your answers instantly and shows the correct methodology in the solution box.

Absolutely. Our content team regularly updates the question bank to reflect the latest JKSSB, SSC, Banking, Railways, Defence, and other competitive exam trends.

The number of questions varies by topic and is regularly expanded to provide comprehensive practice coverage for competitive examinations.

Yes, you can attempt the questions as many times as needed to improve accuracy, speed, and concept retention.

Yes, important questions are accompanied by explanations and solutions to help candidates understand the correct answers effectively.

Yes, this topic is frequently covered in various competitive examinations and forms an important part of exam preparation strategies.

Absolutely. The questions are suitable for both beginners and advanced learners preparing for competitive examinations.

Topic-wise practice helps identify weak areas, strengthen concepts, and build confidence before attempting full-length mock tests.

Yes, the question database is continuously updated with new MCQs to maintain relevance and align with changing exam patterns.

Regular practice with topic-wise MCQs helps candidates reduce mistakes, improve accuracy, and perform better in actual examinations.

Yes, topic-specific MCQs provide a quick and effective revision method for reinforcing important concepts before exams.

The question bank includes a mix of easy, moderate, and challenging questions designed to reflect real competitive exam standards.

Solution View

Correct Answer
Detailed Explanation: