Practice Physics GS Questions and Answers

• A closely wound solenoid 40 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 2 cm. If the current carried is 8.0 A, esti...
• What will be the energy possessed by a stationary object of mass 10 kg placed at a height of 20 m above the ground? (Take g = 10 m/s^2)
• An object is placed at a distance of 10 cm in front of a double convex lens made of glass of refractive index 1.5. Both the radii of curvature of the lens ...
• A 4 cm wire carrying a current of 15 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T....
• Current sensitivity of a moving coil galvanometer is 9 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 30 div/V. The re...
• A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves:
• Which of the following rays are not deflected by a magnetic field?
• A circular coil of wire consisting of 120 turns, each of radius 12 cm carries a current of 0.30 A. What is the magnitude of the magnetic field B at the cen...
• What is the magnitude of magnetic force per unit length on a wire carrying a current of 10 A and making an angle of 30° with the direction of a uniform...
• A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the ...
• A charged particle oscillates about its mean equilibrium position with a frequency of 105 Hz. What is the frequency of the electromagnetic waves produced b...
• The electric and magnetic fields of an electromagnetic wave are _____________
• A stone of mass 0.08 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the stone during its downward motion. Ignore air...
• A constant retarding force of 60 N is applied to a body of mass 25 kg moving initially with a speed of 12 m s–1. How long does the body take to stop?...
• A body of mass 3 kg is acted upon by two perpendicular forces 9 N and 12 N. Find the resultant of two forces and the acceleration of the body.
• One kilogram of ice at 0° C is mixed with one kilogram of water at 85° C. The final temperature of the mixture is (Tale specific heat of water = 42...
• A spherical black body with a radius of 8 cm radiates 450-watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in...
• The absolute temperature of a body A is five times that of another body B. For two bodies, the difference in wave lengths at which energy radiated is maxim...
• The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0 ×108 m s-1)
• A beam of light consisting of two wavelengths, 600 nm and 420 nm, is used to obtain interference fringes in a Young’s double-slit experiment. Find th...
• A 220 V, 100 W bulb is connected to a 110 V source. Calculate the power consumed by the bulb
• Which of the following materials is used for the generation of ultrasonic waves by using magnetostriction effect?
• Which of the following particles in motion, having the same kinetic energy, has the shortest wavelength?
• A positron is an anti-particle of an electron, having the same mass but opposite charge to electron. Then, the minimum energy released in annihilation of m...
• Ultrasonic pulse echo technique, a non-destructive ultrasonic testing, is employed for any possible flaw detection in a metallic bar of thickness 30 cm. If...
• In an experimental arrangement of a Fresnel's biprism, monochromatic light of wavelength 2. is used to produce interference fringe pattern. On introducing ...
• The frequency of ultrasonic waves is:
• A sugar solution in a tube of length 2.0 dm produces optical rotation of 12°. Then, the sugar solution is diluted to one half of its initial concentration...
• Which of the following equations correctly represents the momentum p of a photon of Energy E?
• The group velocity of matter waves associated with a moving particle is:
• The speed of a fast moving electron, having total energy of 2 MeV, is nearly:
• Which of the following materials behaves as a dielectric?
• The ratio of the amplitudes of the electric field and magnetic field strengths has the same dimensions as that of:
• For a non-relativistic particle, the ratio of phase velocity to group velocity of de Broglie waves is:
• Which of the following phenomena establishes the transverse nature of light waves?
• Ultrasonic waves, propagating through a medium, can be detected by:
• Which of the following is the energy quantum of radiation?
• The refractive indices of quartz crystal for right handed and left handed circularly polarized light of wavelength 762.9 nm are 1.5391 and 1.5392 respectiv...
• The wavelength produced by a He-Ne laser corresponds to the transition in: