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Explain Faraday's laws of electromagnetic induction? Ans. First Law of faraday: Whenever the flux linked with a circuit is changed an e.m.f. is generate in the circuit Seco
The main constituents of glass is (A) SiO 2 (B) B 2 O 3 (C) Al 2 O 3 (D) Cr 2 O 3 Ans: The main constituents of glass are SiO 2 .
Intensities of an ordinary light and laser light The intensity (I) of a wave is the energy per unit time flowing through a unit normal area. The light from an ordinary light so
Explain Radioactivity and its Problems and Applications ? All radiation, electromagnetic as well as the kind from nuclear decay, takes its toll on living organisms. If the radiati
A ray of white light in air passes by a glass plate. Refraction takes place. The direction in which the light is travelling changes. For what colour of light is the alteration in d
With the help of a circuit diagram, explain how regenerative feedback is provided in an Hartley oscillator?
(UNIFORM VELOCITY) (i) When instantaneous velocity and average velocity of a body are equivalent, then the body moves with uniform velocity. (ii When instantaneous velocity
The nucleus of the element having atomic number 25 and atomic weight 55 will contain : (1 )25 protons and 30 neutrons (2) 25 neutrons and 30 protons (3) 55 protons (4)
The rate of change of angular velocity with related to time is known as angular acceleration.
Q. Carbon-14, or 14 C, is an isotope of the common 12 6 C, and is used in dating ancient artifacts. What is the composition of its nucleus? Six protons (equal to Z) an
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