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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.
The voltage drops across two components when connected in series across an a.c. supply are v1 =150sin 314.2t and v2 =90sin(314.2t -∏/5) volts respectively. Determine (a) the v
A reaction is first order in A and second order in B. (a) Write differential rate equation. (b) How is the rate affected if the concentration of B is tripled? (c) How is
Q. (a) A giant refracting telescope at an observatory has an objective lens of focal length 15m. If an eyepiece of focal length 1.0 cm is used, what is the angular magnification o
Explain vectors Vectors : a quantity that has a size as well as direction is known a vector. So, for example, the wind blows with some speed and in some direction. So the win
Q. The minimum wavelength of X-rays produced in a Coolidge tube is 0.05 nm. Find the operating voltage of the Coolidge tube. λmin = 12400 A 0 / V = 0.5 X 10 -10 m Theref
Write two characteristic features of nuclear force which differentiate it from the Coulomb force.
When a hard element is suspended from an axis and made to oscillate about that, then it is known as compound pendulum. C = Initial position of center of mass C' = Position of
GM counter
When does the Total mechanical energy remain constant?
One of the Maxwell's e-m equations involves the curl of the electric field. Write down the equation and mention the law of electromagnetism which is shown by the equation.
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