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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
Where do you find the null points in the combined field due to the earth and a bar magnet, when i) the N-pole of the magnet is taken towards the north of the earth, ii) the
The signal which shows the continuous variation of voltage with time is called as analog voltage signal
Determine the value of ‘a' for which the vector field is solenoidal.
factors affecting emf of cell
Motion of an object in a straight line is called one dimensional motion. The location of a particle in one dimensional motion can be explained by only one variable (say x). For a p
Define the formula of Wien law. WIEN'S LAW: λ m T = constant Here: λ m = Peak Wavelength (m) T = Surface Temperature (K) Constant = 2.898 x 10 -3 mK It
a body is thrown horizontally with a velocity of u from the top of a tower. the displacement of the stone when the horizontal and vertical velocities are equal is
Which of the following scientists is responsible for the exclusion principle which states that two objects may NOT occupy the same space at the same time? Was it: a) Heisenbe
What is the luminous flux of a flashlight that provides an luminance of 145 lx to the surface of water when held 0.50 m above the water?
Reducing friction by an air stream Cut out a disc of cardboard about 10 cm in diameter. With a red-hot pin, burn a hole by the centre. Saw a small cotton reel in half and glue
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