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Three similar coils, each having a resistance of 8 and an inductive reactance of 8 are connected
(a) in star and
(b) in delta, across a 415V, 3-phase supply.
Measure for every connection the readings on each of two wattmeters connected to measure the power by the two-wattmeter method.
Q. A small telescope has an objective lens of focal length 144cm and an eyepiece of focal length 6.0cm.What is the magnifying power of the telescope? What is the separation between
tell the fixed transistor bias and describe the design
Write a short note on different kinds of capacitors. Applying Gauss's law derive the mathematical expression for electric intensity due to a charged conducting spherical shall
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In Bohr's theory of the atom, what force was responsible for holding the electrons in their orbit? Ans: Coulomb force or the force of attraction among the proton (nucleus) a
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find the value of 10J when 1 kg,10cm,and 5 min is given
The specific resistance of copper is 1.7ohm. find the resistance of copper wire of length 10m and diameter 1mm. solution) R=ρ*l/A so ou have ρ,l and r(radius). you can use the f
Photoelectric effect An effect described by A. Einstein that demonstrates that light appears to be built up of photons or particles. Light can do excite electrons (called phot
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