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It has been known for a thousand years or more (originating in China) that certain (magnetic) materials would always orientate themselves in a particular direction if suspended to rotate freely. The very earliest experiments in magnetism were done with these materials (permanent magnets) and these clearly showed that two pieces of these materials were able to exert some force at a distance. This force is analogous to gravitational force. We know from our own experience that it exists. Physicists theorise on the causes whilst engineers are more concerned with being able to measure the practical effect and put it to use by devising a suitable method of analysis.Very early experiments by Oersted and Ampere showed that a current carrying conductor also had an effect on magnetic material in its vicinity. Magnetic compasses placed near to a current carrying conductor were deflected. He also found that the direction of deflection depended on the position relative to the wire. Those above the wire were deflected in the opposite direction to those placed below. Ampere quantified the strength of this force in terms of the current and the distance involved. In order to be able to relate these observations to analysis, the concept of a magnetic field was introduced.The presence of a magnetic field may be visualised by drawing imaginary continuous lines of 'magnetic flux', the density of which is a measure of the strength of the field in a given material. Arrows are added to the flux lines to indicate the direction of the magnetic field, from which the direction of the force it produces on, for example, compass needles and current carrying conductors can be deduced. Convention has it that the magnetic field strength is denoted by the symbol H (ampere.turns), whilst magnetic flux density is given the symbol B (Webers/m2).
Q. What is a clipper circuit? Clipping circuits are linear wave shaping circuits. The main function of 'clipper' is that it clips off a part of input waveform i.e., it cut off
explanation
Q. Give suitable block diagram to explain the working of electronic multimeter. Sol. An electronic multimeter is a laboratory instrument which is capable of measurement of
can you differentiate the alpha,beta and gamma
transfer function of Lube Oil Cooler Temperature
Change Management in Power Distribution: Organisational change might be described as an organisation-wide effort to augment the effectiveness of an organisation through str
Mention how do the following instructions differ in their functionality SUB: It performs changes the destination operand and the subtraction operation. CMP: Comparison instr
Write a program to count how many from your data set called MYDATA, which is a set of signed single-byte numbers, has positive value and are odd numbers. Save the result in POSOD
When both MT 2 and Gate are Negative In this case N 3 works as a remote gate. Current flows form layer P 2 to layer N 3 junction N 1 P 1 is reverse biased and it br
explain dynamically induced emf and derive expression for it
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