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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.
A worker lifts a 10 kilogram block a vertical height of 2 meters. The work he does on the block is: a) 5 Joules b) 20 Joules c) 49 Joules d) 200 Joules Ans:
A spacecraft design similar to GEOSAT proposes to use passive gravity-gradient stabilization for pitch attitude control (motion about the y-axis). The satellite consists of a tip
Explain Kelvin-Planck statement and Clausius statement Kelvin-Planck statement: "No process is possible whose sole result is the absorption of heat from a reservoir and the t
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working of deflection magnetometer
In p-type semiconductor the majority carriers are (A) Holes. (B) Positive ions. (c) Electrons. (D) Negative ions. Ans: In p-type semiconductor the majori
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Super conductivity has long been a staple of science fiction one of the first mentions of the phenomenon occurred in Robert A Heinlein’s novel “Beyond this Horizon (1942)”. Notably
Derive the mathematical relation connecting n,u,v and R for refraction at a spherical surface concave towards a point object in a denser medium.
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