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According to their frequencies, waves are separated into three categories:
(1) Audible or sound waves : Range 20 Hz to 20 KHz. These are formed by vibrating bodies like as vocal cords, membrane or stretched strings.
(2) Infrasonic waves : Frequency lie below 20 Hz.
Example : waves formed during earth quake, ocean waves etc.
(3) Ultrasonic waves : Frequency greater than 20 KHz. Human ear cannot listen these rays, certain creatures such as dog, bat and mosquito show result to these.
Illustrates some applications of holography? Applications of Holography Holography can be put to many of uses other than recording images. Holographic data storage is a proc
I WANT SHORT THEORY OF DEFLECTION MANGNETOMETER TAN A& TAN B
The spring of constant k is un-stretched when the slider of mass m pass position B as shown in the figure above. If the slider is released from the position A, Determine: (i) S
Screw gauge works on the rule of screw. It has a linear scale called as the main scale, and another scale called as the circular scale. The circular scale can be moved by a head sc
What occures to the normal shift when the thickness of the optical medium is decreased? Write down the expression for equivalent focal length of combination of two thin lenses d
Get a mathematical expression for current and impedance in series LCR circuit. Reduce an expression for the resonating frequency of an LCR series resonating circuit.
The graph shown in Figure was obtained during an experiment on a diode. (a) What type of diode is this? Give reasons. (b) Determine the forward current for a forward voltage
What are "Overtones" and "Harmonics" ? How are they build in an open pipe? Derive the mathematical equations for the frequencies of the harmonics produced in an open pipe.
The p.d.'s calculated across three resistors linked in series are 5V, 7V and 10V, and the supply current is 2A. Determine (a) The supply voltage, (b) The total circuit res
Ferrites are (A) Ferromagnetic material. (B) Ferrimagnetic materials. (C) Anti ferromagnetic material. (D) Diamagnetic materials. Ans: Ferrites are ferro
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