Physics questions
20027 published questions with worked solutions.
- The work function of a substance is 3.0 eV. The longest wavelength of light that can cause the emission of photoelectrons from...
- The diffraction pattern of a light of wavelength 400 nm diffracting from a slit of width 0.2 mm is focused on the focal plane of...
- Match List-I with List-II. List-I: (A) Coefficient of viscosity, (B) Surface tension, (C) Angular momentum, (D) Rotational...
- A series L.R circuit connected with an ac source E = (25 sin 1000 t) V has a power factor of 1/√2. If the source of emf is...
- Young's modulus of material of a wire of length 'L' and cross-sectional area A is Y. If the length of the wire is doubled and...
- At which temperature the r.m.s. velocity of a hydrogen molecule equal to that of an oxygen molecule at 47° C?
- The gravitational potential at a point above the surface of earth is – 5.12 × 10⁷ J/kg and the acceleration due to gravity at...
- The electric field of an electromagnetic wave in free space is represented as E = E_0 ( t - kz) i. The corresponding magnetic...
- The distance between object and its two times magnified real image as produced by a convex lens is 45 cm. The focal length of the...
- A capacitor of capacitance C and potential V has energy E. It is connected to another capacitor of capacitance 2C and potential...
- In a closed organ pipe, the frequency of fundamental note is 30 Hz. A certain amount of water is now poured in the organ pipe so...
- The horizontal component of earth's magnetic field at a place is 3.5 × 10⁻⁵ T. A very long straight conductor carrying current of...
- The displacement and the increase in the velocity of a moving particle in the time interval of t to (t + 1) s are 125 m and 50...
- A ceiling fan having 3 blades of length 80 cm each is rotating with an angular velocity of 1200 rpm. The magnetic field of earth...
- The mass of the moon is 1/144 times the mass of a planet and its diameter is 1/16 times the diameter of a planet. If the escape...
- A uniform magnetic field of 2 × 10⁻³ T acts along positive Y-direction. A rectangular loop of sides 20 cm and 10 cm with current...
- Given below are two statements: Statement I : Electromagnetic waves carry energy as they travel through space and this energy is...
- A gas mixture consists of 8 moles of argon and 6 moles of oxygen at temperature T. Neglecting all vibrational modes, the total...
- In a photoelectric effect experiment a light of frequency 1.5 times the threshold frequency is made to fall on the surface of...
- When unpolarized light is incident at an angle of 60° on a transparent medium from air, the reflected ray is completely...