A ray of light is incident on a transparent glass slab of refractive index 1.62. The reflected and refracted rays are mutually perpendicular. The angle of incidence is
Options
(a) 58.3° (b) 50° […]
The drift velocity of free electrons in a conductor is v, when a current I is flowing in it. If both, the radius and the current is doubled, then drift velocity will be
Options […]
With the decrease of current in the primary coil from 2 amperes to zero value in 0.01sec, the emf generated in the secondary coil is 1000 volts. The mutual inductance is
Options
(a) […]
A body of mass m is orbiting the earth at a radius r from the center of earth. Another body of mass 2m is orbiting at a radius 2r. What is the ratio of their […]
The magnetic susceptibility of a material of a rod is 449. Permeability of vaccum is 4 π x 10⁻⁷ henry/m. Absolute permeablity of the material of the rod in henry/meter is
Options
(a) […]
The r.m.s speed of the molecules of a gas in a vessel is 400 m/s. If half of the gas leaks out at constant temperature, the r.m.s speed of the remaining molecules will be
The de-Broglie wavelength of an electron having 80 eV of energy is nearly(Given 1 ev= 1.6 x 10⁻¹⁹ kg, Mass of electron=9 x 10⁻³¹ kg, Planck’s constant= 6.6 x 10⁻³⁴ J-sec)
Options
(a) […]
Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept at 50° C and 60° C. Amount of heat absorbed by the conductor when a charge of 10C flows through it is […]
Two pendulums A and B are oscillating simultaneously with time period T and 5T/4 respectively. What is the phase difference between them after B completes one oscillation?
Options
(a) 60° (b) 45° (c) […]
A particle under the action of a constant force moves from rest upto 20 seconds. If distance covered in first 10 seconds is S₁ and that covered in next seconds is S₂, then
Options […]
2017-2025 Copyright Doctor Dreams Training Academy - About Us - Privacy Policy - Terms & Conditions - Contact Us - Refund Policy