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A sodium cation has different number of electrons from: (1) O 2- (2) F - (3) Li + (4) Al +3 Ans: Li +
Light is shined into a glass rod. To guarantee the total internal reflection (TIR) happens to all the possible rays, what is the minimum index of refraction n for the glass?
An object is placed 25.0cm from a thin converging lens. A screen is positioned so that a sharp image of the object is seen on the screen. When the object is moved 4.0cm closer to t
If each point of a surface is at similar potential, then it is known an equipotential surfac. or For a given charge distribution, locus of each and every positions having sim
Olbers' paradox (H. Olbers; 1826): If the Universe is uniform, infinite & unchanging then the whole sky at night would be bright regarding as bright as the Sun. The further yo
A 2.0 kg tumor is being irradiated by a radioactive source. The tumor receives an absorbed dose of 12 Gy in a time of880 s. Each disintegration of the radioactive source produces a
In free space electric field intensity is provided as E= y 20 cos (ωt-50x) volt/m. Determine displacement current density.
Resistance in Series: In such a combination the resistors give a single path to the passage of current and similar current passes by each of the resistors.
Three inductive loads, each of resistance 4Ω and reactance 9Ω are linked in delta. When linked to a 3-phase supply the loads consume 1.2kW. Calculate (a) The power factor of
Describe the variation of the radius of bright fringe of Newton's rings with refractive index of the thin film enclosed between the glass plate and plan-convex lens when observed b
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