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what is resistor
Resistor is used in electric or electronic circuits to regulate the current or resistors are used in potential divider in circuits

Figure shown above is a circuit, where a device is connected to electrical power supply of potential differece V through a resistor R.

If the device resistance is r, then current i passing through the device is given by,  i = V / ( R + r)

We can regulate the current i , by changing resistance value of R.

Above figure shows series combination of two resistances R1 and R2 is connected to power supply of potential difference V .

If we take potential difference across R2 , we get potential difference = V × [ R2 / ( R1 + R2 ) ] .

Above figure shows the resistance used in electrical and electronic circuits. Color code gives the resistance value.

Resistance is the property of resistor. Unit for resistance is Ohm

Answered by Thiyagarajan K | 12 Dec, 2019, 12:10: AM

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