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Q Define threshold frequency?
The minimum frequency of incident radiation lower which the photoelectric emission isn't possible completely but high the intensity of incident radiation may be. The threshold frequency is dissimilar for different metals.
Explain 'drift velocity of free electrons'? Derive Ohm's law on the basis of the theory of electron drift.
factors affecting emf of cell
At what temperature would the average speed of helium atoms equal (a)the escape speed from Earth, 1.12 ´ 10 4 m/s, and (b) the escape speed from the Moon, 2.37´ 10 3 m/s? (See Ch
The liquid calculates milliliter, mL, is the same as 1 cm 3 . How many milliliters of liquid can be held in a 2.5-m 3 container?
why is friction necessary
obtain an expression for dipolar polarisability of a dielectric at moderate temperature
Q. Why does sun seems flat during sunrise and sunset? Answer:- The sun rays have to move through a larger atmospheric distance. The majority of the blue light and shorter
Cathode rays are made up of: (1) Positively charged particles (2) Negatively charged particles (3) Neutral particles (4) None of these Ans: (2)Negatively charged pa
give brief detail of heat loss in cylindrical pipe
An object is thrown at 25 m/s at 39 degrees above the horizontal from a 40m tall cliff. How long is it in the air?
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