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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.
A force of 2.5kN is needed to lift a load. How much work is done if the load is lifted by 500cm? An electromagnet exerts a force of 12N and moves a soft iron armature by a dist
what will happen when a ball is dropped in a hole passing through the centre of earth through out diametrically?
a) Amplitude : It is the main value of distance of the particle from its equilibrium position. b) Time period (T): Smallest time interval after which the oscillatory motion
A model to show the apparent path of the sun among the stars The signs of the zodiac are drawn in the correct order on a strip of paper about 60 cm long and 8 cm wide. The ends
A pendulum is timed, first for 20 swings and then for 50 swings Time for 20 swings= 17.4s Time for 50 swings= 43.2s Calculate the average time per swing in each case.
Are machines with the CE mark certified? The CE mark was a good concept in its inception but this has been so much abused which has become practically meaningless for the end u
The lagging of an effect behind its cause; especially the phenomenon in which the magnetic induction of a ferromagnetic material lags behind the changing magnetic field.
explain briefly about piezoelectric effect to produce ultrasonics
PRINCIPLES OF OPERATING DEPLETION MOSFET
a) Explain the magnetic effects of current? b) Do the diagram to show the direction of motion of the conductor:
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