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Define the terms threshold frequency and stopping potential in relation to the phenomenon of photoelectric effect. How is the photoelectric current affected on enhancing the
(i) frequency
(ii) intensity of the incident radiations and why?
determine the neutral point in a system of two unlike charges seperated by a distance
what is meant by lead time of scientific development
A more forceful argument which the weak principle: This implies that if the laws of the Universe were not favorable to the development of intelligent creatures to ask regarding the
The plates of a parallel plate capacitor are 5 mm apart and 2 m 2 in area. The plates are in vacuum. A potential difference of 10000 Volts is applied across the capacitor. Calcu
Q. What is an optical fibre and dispersion? Write the expression for angle of deviation.
Two observers, A on earth and B in a spacecraft whose speed is 2.00 x 108 m/s, both set their watches to the same time when the ship is abreast of the earth. (a) How much tim
The Tesla and the Gauss are units of measure of: a) Conductance b) Magnetic field strength c) Magnetic flux d) Electrical current Ans: The Tesla and Gau
Einstein-Podolsky-Rosen effect; EPR effect: Assume the following quantum mechanical thought-experiment: Take a particle that is at rest and contain spin zero. It decays sponta
An object in free fall has an acceleration of 9.80 m/s 2 assuming that there is no air resistance. What is the speed of an object dropped from the top of a tall cliff 3.50 s a
If conductors carries current in similar direction, then force among them will be attractive. If conductor carries current in reverse direction, then force among them will be repul
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