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A single turn coil of radius 5cm is placed on a plane paper and magnetic flux, directed perpendicularly out of the paper changes according to φ = 11t2 + 7t + 15. Determine the magnitude and direction of induced emf in the coil at time t = 1.5s?
Que: Consider two identical tiny metal balls one having a charge of +1 micro-coulombs and the other having a charge of +3 micro-coulombs. The balls are separated from each one
Newton''s rings are formed between a spherical lens surface and an optical flat. If the tenth bright ring of green light (545.1 nm) is 7.89 mm in diameter, what is the radius of cu
SMALL ALKALINE CELLS: Hermetically sealed Ni-Cad cells are produced in the same size and shape as their primary counterparts. They are small, portable and maintenance free, but
Define the formula of Wien law. WIEN'S LAW: λ m T = constant Here: λ m = Peak Wavelength (m) T = Surface Temperature (K) Constant = 2.898 x 10 -3 mK It
Given the ratio of velocities of two light waves traveled in vacuum and having wave lengths 5000A o and 6000A o . Can you explain by working of diamonds sparkle?
Q. What are emissive and absorption spectra? Emission spectrum: When the light emitted straight from a source is examined with a spectrometer the emission spectrum is ob
Does sunlight reflected off a mirror enhance the temperature of the sun-rays? A standard planar mirror will not enhance the energy contained in the rays that reflect off it. In
Q. Jingdan turned a screwdriver into a magnet by rubbing it with a strong bar magnet to pick up a screw that has fallen into an inaccessible spot. How could he demagnetize his
In p-type semiconductor the majority carriers are (A) Holes. (B) Positive ions. (c) Electrons. (D) Negative ions. Ans: In p-type semiconductor the majori
Magnetic force on a moving charge Oersted also discovered that anytime a charge is moving in an area where a magnetic field exists, it experiences a force which is sometimes call
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