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A radiation of 500nm is incident on a metal surface whose work function is 3ev.why do we not observe the phenomenon of photoelectric effect? Ans) Because the energy of radiation i
What is coulmb''s law
True or False. The specific gravity of a fluid that sinks in water is greater than 1.00.
Dielectric break down Dielectric Breakdown : Dielectric Breakdown of a dielectric material is because of the excitation of electrons into the conduction band across the energy
In an electric field a charge (Q) experiences a force F = QE. If charge is positive then force is directed in the direction of field whereas if charge is negative force acts on i
Two parallel plates having a p.d. of 250V between them are spaced 1mm apart. Determine the electric field strength. Find also the electric flux density when the dielectric a
When is the combination of cells advantageous and why? (Mar 2009) What do you mean by internal resistance of a cell? Write down the value of internal resistance of an ideal cell
Scientific principle behind a laser: The basic scientific principle behind a laser was first put forward by Dr. Charles H. Towns in 1954 which later led to the development
Why should the material used for making permanent magnets have high coercivity? What will be the values of input A and B for the Boolean expression? Why is frequency modulati
For any single force vector, there is only one angle for which its x- and y-components are equal in size. a. What is that angle? b. How many times bigger is a vector at this
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