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(i) The procedure of ejection of electrons from a metal surface by the application of heat is known as thermionic emission and emitted electrons are known as thermions and current flowing is known as thermion current.
(ii)Thermions have dissimilar velocities.
(iii)This was discovered by Edison
An elementary particle is: (1)An element present in a compound (2)An atom present in an element (3)A sub-atomic particle (4)A fragment of an atom Ans: (3)A s
What do you mean by the ratio of the frequency of fourth overtone to the fundamental frequency of a stretched string?
A convex lens of refractive index 1.5 of focal length 0.2m is immersed in water of refractive index 1.33. Determine the focal length of lens in water.
Q. Name the types of photoelectric cells? The photo electric cells are of three kinds: A) Photo emissive cell B) Photo voltaic cell and C) Photo conductive cell.
(i) These are positive ions having similar mass if the experimental gas does not have isotopes. However if the gas has substances then positive pulses are group of positive ions ha
Find amplitude of electric field ina parallel beam of light of intensity 2W/m2 Ans: Given that intensity I=power/area=2W/M2 by using this formula :intensity I=(Emax^2/2c mue not
what is viscosity?
Simple steelyard (reading to 100 g) The pan is made from cardboard, and is formed like a funnel. It is fixed to a beam made of a triangular-shaped lamina in ply- wood or 'Persp
In a transmitter the final stage class C amplified with 18V DC supply calculate what equivalent Road the transistor to an antenna with 50ohm load impedance design and draw an L n
Does solar radiation contain a complete spectrum of all forms of electromagnetic radiation? Yes it does. It have all the forms of radiation, but 99% of its energy is carried
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