# Physics Questions Physics is one of the branches of Science and also the most fundamental scientific disciplines. Physics helps in understanding everyday activities such as answering questions like why the sky is blue, what makes us walk easily on roads, why is it important to have a moon, etc.

From the above-mentioned examples, it becomes clear that Physics concentrates in explaining the behaviour of the universe, force, and matter and their effects. Physics has helped in developing new technologies and in many inventions.

Physics as a subject is further divided into branches which include Modern Physics, Classical mechanics, Astrophysics, Nuclear Physics, Electromagnetism, and Optics. These branches are further divided into sub-topics and most of these topics are covered in school syllabus.

Class 11 includes concepts like Units and measurements, Kinematics, Gravitation, Oscillation and Waves, Thermodynamics, Laws of Motion, Work, Power, Energy, and Particle movement.

Class 12 includes concepts such as Magnetism, Electromagnetism, Optics, Current electricity, Electrostatics, Dual nature of radiation, and Electronic devices.

We know that all these concepts have major questions that are covered in textbooks which are either descriptive or problematic. Here, at BYJU’S students will find questions that are descriptive as well as concept based. Questions explained here includes examples, properties, principles, types, and definitions.

Answer: Positive work: when force and displacement are in the same direction, the work performed on an object is said to be positive work....
Answer: (2) The velocity of the sound varies in the different medium as given below. Sound travels in solids at a rapid rate than air, fluid or...
Answer: Stopping potential or cut-off potential is defined as the required potential for stopping the removal of an electron from a metal...
Answer: In a vertical circle, a body spins in such a way that its motion at different points is different than the body's motion is assumed to...
Answer: Definition: Electric field lines are an excellent way of visualizing electric field. Electrical lines of force can be described as a...
Answer: Gravitational force is the weakest of all forces since the value of its coupling constant is small. Due to the huge universe surrounding...
Answer: (4) Given parameters The formula for the acceleration due to gravity is where l = 55cm T = 30 sec/20 Δl = 1mm = 0.1cm ΔT =...
Answer: (4) Refractive index is defined as the ratio of the speed of light in a vacuum to its speed in a specific medium. Given parameter The...
Answer: Limitations of dimensionless analysis: This method does not tell us how to determine the proportionality constant value. The method...
Answer: (3) Mercury is the nearest planet to the Sun. And then Venus is the second nearest planet to the Sun, and Earth is the third nearest...