define resistance.
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Resistance is the property of a a conductor which opposes the flow of current.
It depends on length and area of cross section .It also depend on resistivity of the conductor .
Ohmmeter is a device used to measure electrical resistance.
SI UNIT -Ohm
1 ohm = 1 volt / 1 Ampere
A rheostat or a variable resistor is a device or a component which allows changing of resistance in a circuit .
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Resistance is a measure of the opposition to current flow in an electrical circuit.
Explanation:
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