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Explain the term 'work function' of a metal. The threshold frequency of a metal is f0. When the light of frequency 2f0 is incident on the metal plate, the maximum velocity of electrons emitted is v1. When the frequency of the incident radiation is enhanced to 5f0, the maximum velocity of electrons emitted is v2. Find the ratio of v1 to v2.
Derivative of the Sine Function Extending a tradition of complex interrelations between the trigonometric functions, it turns out in which the derivative of the sine function i
The idea that everything is made up of very small particles has been developed over many years supported by several experiments: (i) Brownian motion :
Q. What are emissive and absorption spectra? Emission spectrum: When the light emitted straight from a source is examined with a spectrometer the emission spectrum is ob
A ball with a mass of 25 grams is dropped from ledge 908 meters above the ground. What is its kinetic energy the instant before it hits the ground? What is the potential energy of
Explain about the Homojunction Laser in brief. Homojunction Laser: Assume that GaAs be doped with T providing n-type material and with Ge providing p-type material. In forwa
Iron pan This is useful for many experiments in chemistry. The lid of a preserving jar is looped with galvanized wire. The free end of the wire is embedded in a piece of wooden
A VDR is a special type of resistor that changes its resistance with rise in voltage. It has a very high resistance at low voltage (below the trigger voltage) and very low resista
Describe power of a lens. Write its SI unit. What do you mean by linear magnification produced by a lens in a direction perpendicular to its axis? Write down the mathematical expre
Voltage: Voltage is the electrical equivalent of mechanical potential. If a person drops a rock from the first storey of a building, the velocity it will reach when dropped wi
Q. How can we increase the current sensitivity of a galvanometer? The current sensitivity of a galvanometer is able to be increased by (i) Rising the number of turns (ii
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