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Q. What are the uses of an electron microscope?
Uses of electron microscope:
(i) It is utilized in the industry to study the surface of metals, structure of textile fibres, composition of paints etc.
(ii) In medicine as well as biology it is used to study virus, and bacteria.
(iii) In Physics it has been utilized in the investigation of atomic structure and structure of crystals in detail.
Explain how suppressor grid eliminates effect of secondary emission in pentode Ans: Suppressor grid is placed in between plate and screen grid. It's connected with the cathode
what is magnetic flux density of cylinder??
A thermodynamic process, in which the volume of gas always same is known as isochoric process. In this process, the work completed by the body is zero. Therefore from first law
Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because: a) red light is focused more strongly than blue light b)
derive an expression for density of states and hence deduce an expression for carrier concentration of metals
Q. Why there is no horizontal acceleration during projectile motion? Ans: The gravitational force (F)acting on the particle during its flight has only vertical component i.e. F(co
HOW TO FIND HALF LIFE
A balance trick Get a smooth metre stick and let it rest lightly on your two forefingers. Place your fingers near the ends of the stick and then move them in the direction of t
Explain Centripetal force?? Sir Isaac Newton suggested that motion in a straight line is most natural, and that deviations from this type of motion are caused by a force pullin
What is spontaneous emission? Explain in brief. Spontaneous emission: a. This is the process by that a light source as like an atom, molecule, nano-crystal or nucleus into a
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