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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.
For the magnetic circuit shown in Figure find the current I in the coil needed to produce a flux of 0.45mWb in the air gap. The silicon iron magnetic circuit has a uniform cros
Will a DC motor actually produce voltage if it is spun in reverse? It'll make voltage if you spin it forwards, too. The only difference among a DC motor and a DC generator is w
Illustrate the chemical vapour deposition method in brief. Chemical vapour deposition method (CVD): A number of vapour phase deposition process have been developed for produ
A boy is standing on an elevator which is travelling downward with constant velocity of 30 meters per second. The boy throws a ball vertically upward with velocity of 10 meter
Keplers Second Law After studying a wealth of planetary data for the motion of the planets about the sun, Johannes Kepler reasons three laws of planetary motion. Kepler's secon
Avogadro constant; L; NA (Count A. Avogadro; 1811) The number of items in a sample substance is equivalent to the number of atoms or molecules in a sample of ideal gas that is
Consider the water heat distribution system shown below where: The fractions refer to the fraction of the stream ?owing, e.g. 20% of the stream leaving the 100,000 Btu/ hr heate
Inverting Summing Amplifier Fig shows inverting summing amplifier. It's a inverting configuration with three inputs V A , V B and V C . Depending on the relationship betwee
a) For the 30days beginning July 15 find a list of moon rise times for Australia, Brisbane. From these data make a table and calculate the period of the moon in its orbit arou
When throwing a baseball, a force is exerted by the hand on the ball. a. Is this force a contact force or a field force? Contact Force b. Throwing a ball 6 m straight upwa
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