what is electronics?
The branch of physics and technology concerned with the design of circuits using transistors and microchips, and with the behaviour and movement of electrons in a semiconductor, conductor, vacuum, or gas.
Resistors /ohms law
Resistors come under passive electronic components and are extensively used in electronic circuits. So important are these components that it may be virtually impossible to build an electronic circuit without involving resistors. Basically the function of a resistor is always to oppose the flow of current through it and the strength of this opposition is termed as its resistance. German physicist, Sir G.S. Ohms was able to discover a definite relationship between voltage, current and resistance. According to him a potential difference or a voltage (V) across a resistor (R) is proportional to the instantaneous current (I) flowing through it .and is given as:
V = R.I
Here R is the constant of proportionality and is known as the resistance of the resisto
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