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Q. What is microwave oven? How it works?
Microwave oven It is utilized to cook the food in a short time. When the oven is manage the microwaves are generated which in turn produce a non-uniform oscillating electric field. The water molecules in the food that are the electric dipoles are excited by an oscillating torque. Therefore few bonds in the water molecules are broken and heat energy is produced. This is utilized to cook food.
expression for the interference in transmitted light through thin films
two forces of 20 units and 30 units act at right angle what is the magnitude of resultant force
A moving elevator and a ball or an object being dropped inside it with some given speed/acceleration. Ans) You must know the concept of inertial and noninertial frames.non inertia
Q. What are emissive and absorption spectra? Emission spectrum: When the light emitted straight from a source is examined with a spectrometer the emission spectrum is ob
what happens to a conical pendulum when the bob splits into two parts such that one part remains attached to the string?
Any rigid body suspended from a fixed support constitutes a physical pendulum. Let Consider the situation when the body is displaced by a small angle Torque on the body about O is
Polystyrene film is extruded flat and free from pin-holes. Film is made from polystyrene granules by extruding heated tube of polymer which is then spread out and stretched state.
Q. Compute the resistance of the filament of a 100W, 220 V electric bulbs. Power P = V 2 /R Resistance R = V 2 /P = (220 X 220)/ 100 = 484 ohm.
Regard as three resistors having three unique values of resistance. Presume the resistors are connected in series with each other. Additional suppose that the series combination of
how much energy is required to raise an object of 300g that is initially at rest to a height of 2m and simultaneuosly give the object a velocity if 4m/s?
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