Question

define the following :-
ohm's law
rheostat
resistivity
resistance​

Answer 1

Answer:

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

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A rheostat is a variable resistor which is used to control current. ... Rheostats were often used as power control devices, for example to control light intensity (dimmer), speed of motors, heaters and ovens. ... A rheostat is a variable resistor which is used to control the current ...

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Resistivity is a measure of the resistance of a given size of a specific material to electrical conduction. ... Materials that conduct electrical current easily are called conductors and have a low resistivity.

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Resistance is the opposition that a substance offers to the flow of electric current. ... When an electric current of one ampere passes through a component across which a potential difference (voltage) of one volt exists, then the resistance of that component is one ohm.

Explanation:

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Answer 2

Answer:

HEY BUDDY✌✌

HOPE IT HELP YOU..