Practice Physics GS Questions and Answers

• 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:
• In order to investigate the internal atomic structure of crystals, we make use of:
• A ray of light is incident on a transparent medium at an angle of 60°. The reflected ray of light is found to be completely Q.4 polarized. Then, the refra...
• A meter stick moves along its length with a certain speed. The apparent length of the moving meter stick as measured by a stationary observer on the ground...
• Which of the following materials exhibits piezoelectric effect?
• The experimental evidence that the electron exhibits wave-like characteristics was first provided by:
• Newton's rings can be obtained in:
• Which of the following materials is most suitable for marking electromagnetic and core of transformer?
• Which of the following optical phenomena CANNOT convert unpolarised light to plane polarised light?
• The Pointing vector of electromagnetic waves has the same dimensions as that of:
• The potential inside a charged hollow sphere is __________.
• ________ are the elements of group 18.
• What is the momentum of an object of mass 1/2 m, moving with a velocity of 2V?
• Going from fluorine to chlorine, to bromine and then to iodine, the electro negativity:
• Which of the following does not affect the value of acceleration due to gravity?
• If the distance between two consecutive crests is L, then the wavelength is given by______.
• Which one of the following is the equation for Velocity Time relation?
• If an agent does a work 'W' in time 't', then the power is given by:__________.
• A porter lifts luggage of 20 kg from the ground and puts it on his head 2 m above the ground. Calculate the work done by him on the luggage (take g = 10ms-...
• __________ is the metal used for making the filament of the light bulb.
• The mass and energy equivalent to 1 a.m.u. respectively are -