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The relative permeability of a paramagnetic substance is (A) Unity. (B) Slightly more than unity. (C) Zero. (D) less than unity. Ans: The relativ
Q. State Brewster's law. Brewster's law the digression of the polarising angle is numerically equal to the refractive index of the medium. That is tan ip = μ
A tunning fork produces 4 beats per second with another tunning fork of frequency 256 Hz. The first one is now loaded with a little wax and the beat frequency is found to enhance t
What are different pumping mechanisms in LASERS?
Get expression for intensity of the diffracted beam by single slit. Explain the position of minima and maxima.
Henry; H (after W. Henry, 1775-1836): The derived SI unit of inductance, described as the inductance of a closed circuit wherein an electromotive force of 1 V is generated whe
Q. Show the condition for dispersion without deviation? Q. A thin convex length of focal length 0.1m and a thin concave lens of focal length 0.1m are placed coaxially on contact
When hydrogen atom is excited, it returns to its normal unexcited (or ground state) state by emitting the energy it had absorbed previous. This energy is given out by the atom in t
An ice-skater with a moment of inertia of 1.1 kg/m2 starts to spin with her arms extended. After 25 s, she has an angular velocity of 15 rev/s. What is the net torque acting on
The length of a wire vibrating with a frequency of 340 Hz is 1m . It its length is changed to 1.6 m, determine the frequency. Name any two musical instruments whose working li
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