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Photoelectric electricity is produced directly from solar energy when which following are absorbed in a semiconductor to create an electric current?
a) Protons
b) Electrons
c) Neutrons
d) Photons
Ans- Photons
John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty''s speeds?
how to find magnetic moment and the principle behind the magnetometer?
The dimentional formula of pressure ML -1 T -2
A spring is held vertically downward and a current is passed through it . Then the length of the spring : A . increases B. decreases C . does not change D the spring osc
What do you mean by understand by the statement ‘charge is quantized'? The electric lines of force do not intersect. Why?
the two point charges +10 nano coulomb and -20 nano coulomb are seperated by a distance 0.1m. calculate the neutral point along the line joining of two charges
How do i find the freefall of an object?
why is the sky blue?
Q. Escape Velocity An object will conquer the force of gravity when its kinetic energy in the direction away from earth exceeds its potential energy. We find the smallest kinet
What are the units of fibre optic communication system? Fibre Optic Communication System: This comprises of the given three most important units: a. Transmitter: It has i
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