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Amplifier is a functioning by which the amplitude of variation of ac signal voltage / current/ power can be enhanced
(i) Principle and circuit diagram: The amplifying action of the triode is based on the fact that small change in grid voltage produces the similar change in the grid voltage as because of a large change in the plate voltage. A circuit for triode as an amplifier
(ii) Working: First of all the mutual characteristic curves of a triode to be used as an amplifier is plotted and the grid potential - Corresponding to the mid-point of straight portion of characteristic curve is noted.
Plastics are (A) Good conductors of heat. (B) Good conductors of electricity. (C) Bad conductors of electricity. (D) High density. Ans: Plastics are Bad
Calculate the heat required to melt 316.7kg of potassium metal at 336 K. The enthalpy of fusion of potassium is 2.35 kJ mol -1 .
Ohm's law : The electric current (i) in a conductor is proportional to the potential difference (V) between its ends of a constant temperature (T). Verification: To v
What are ferrites? Ferrites are ceramic compounds having trivalent metal having three valence electrons, iron and oxide of divalent element
How to make a simple pulley A reasonably satisfactory pulley can be complete from a wire clothes hanger and a cotton reel. Cut off both wires of the hanger at a distance of abo
what is cyclotron
how does a magnifying glass work to produce a large or smaller image?
Surface tension can be explained in given possible ways: (i) The property of a liquid on account of which it tends to keep minimum number of molecules in its free surface is d
The waves which do not needs medium for their propagation are known as non- mechanical or electromagnetic waves. Examples : Light, heat (Infrared), radio waves, gamma- rays, X-r
Describe Gauss' law and its importance. Use it to search out the electric field due to a linear and infinite sheet charge distribution and also describe why Gauss' law cant be used
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