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Give reason that ultrasonics not be produced by passing high frequency alternating current by a loud speaker
At these high frequencies, inductive reactance is so high where is no current flows throughout the coil of the loud speaker and therefore ultrasonic waves cannot be produced.
applications of polarisation with explanation
Alternating Current: (AC) Such a current can be obtained if a resistor is linked in series with a source of alternating voltage. This current alters its direction so many times
Simple Harmonic Motion II In physics, simple harmonic motion is a type of periodic motion where the restoring force is directly proportional to the displacement. It can serve a
A boat is traveling along a circular path having a radius of 20 m. Determine the magnitude of the boats acceleration if at a given instant the boats speed is v = 5 m/s and the rate
In the figure below the closed curves A and B represent closed surfaces. What is the total flux by the closed surface A? Ans: In concurrence with Gauss's Law the net o
Uniformity principle (E.P. Hubble): The principle that the laws of physics here & now are not distinct, at least qualitatively, from the laws of physics in previous or future
what is a compound pendulum.in detail
Disadvantages of D.C. Transmission of power 1. Electric power cannot be produced at high d.c. voltages because of commutation problem. 2. The d.c. voltage cannot be stepped
What are The Stars? The star is made of dust and gas in space. Essentially it has many stages they are 1.black hole 2.nuetron star 3.supernova 4.red giant stage
When water is boiled under a pressure of 2.00 atm, the heat of vaporization is 2.20 x 10^6 J/kg and the boling point is 120Degrees C. At this pressure, 1.00 kg of water has a volum
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