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Light with a frequency of 7.5 x 1014 Hz is able to eject electrons from the metal surface of a photocell that has a threshold frequency of 5.2 x 1014 Hz. What stopping potential is required to stop the emitted photoelectrons?
The average distance of an electron in an atom from its nucleus is of the order of: (1) 10 6 m (2) 10 -6 m (3) 10 -10 m (4)10 -15 m Ans: (3) 10 -10 m
dimension of electric current
Define Atmospheric Energy - thermodynamics? The mass of the Earth's atmosphere, p(z), varies with height z above the Earth's surface. Assume that the "thickness" of the atmosp
Explain electric lawn-mower A television set having a power rating of 120W and electric lawn-mower of power rating 1 kW are both linked to a 240V supply. If 3A, 5A and 10A
Dual Nature of Light: As light is accepted as a form of waves as well as packets of photon. This nature of light is known as dual nature of light.
how much water at 0degrees is needed to cool 0.5kg of water at 80degrees to 0degrees
mayer''s relationship connecting Cp and Cv
What is Crystal twinning Crystal twinning occurs when two divide crystals share some of the same crystal lattice points in a symmetrical manner. The result is an intergrowth of
Q. Give three applications of photoelectric cells. (i) Photoelectric cells are utilized for reproducing sound in cinematography. (ii) They are utilized for controlling the
comparison of magnetic moments using an vibrational magnetometer
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