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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
IONIC BOND Ionic bonding involves the transfer of electrons from an electropositive atom (an atom that tends to "donate" an electron) to an electronegative atom (an atom that t
why do we need degenerate semiconductor to fabricate a laser diode?
compostion of two simple harmonic motion
Define, with the help of a schematic diagram, the principle and working of a Light Emitting Diode. What criterion is kept in mind whereas choosing the semiconductor material for su
A cylindrical metallic wire is stretched to enhance its length by 5%. Measure the percentage change in its resistance.
It is an instrument used to detect small current passing by it by showing deflection. Galvanometers are of dissimilar types e.g. moving coil galvanometer, moving magnet galvanomete
sign conventions for lenses
Resistance: Resistance is the opposition to the motion of electrons. This arises as a result of collision of moving electrons. The unit of resistance is "ohm" represented by
1. A child pulls a toy car weighing 0.20 kg across a smooth floor by means of a string attached to it. If the string makes an angle of 60° to the floor and the child pulls with a f
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