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The number of electrons in an atom of an element is equal to its: (1) Atomic weight (2) Atomic number (3) Equivalent weight (4) Electron affinity Ans: Atomic weigh
What is the net force on a conductor of length l carrying current 'i' when it is situated in a magnetic field of induction B? When is it maximum? State and explain Fleming's l
In p-type semiconductor the majority carriers are (A) Holes. (B) Positive ions. (c) Electrons. (D) Negative ions. Ans: In p-type semiconductor the majori
According to Rutherford's experiment when a sample of radioactive substance is place in a lead box and permit the emission of radiation by a small hole only. When the radiation ent
Q. A Plano-convex lens of radius 3 m is placed on a flat glass plate and is illuminated by monochromatic light. The radius of the 8th dark ring is 3.6 mm. Calculate the wavelength
Draw a ray diagram to show the formation of image of an object placed among the optical centre and focus of the convex lens. Write the characteristics of image formed. Using this d
Electric charge is a physical property of matter that causes it to experience a force when near other electrically charged matter. There exist two types of electric charges, called
derivation of sackur-tetrode formula
Q. A compound microscope consists of an objective lens of focal length 2.0cm and an eye piece of focal length 6.25cm separated by a distance of 15cm.How far from the objective sho
what color is used in cro to display to waveform and what is the wavelength of that color
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