Problem: What is the purpose of the rheostat in the resistance and resistivity experiment?1) to limit the current in the circuit.2) to overheat.3) as an aid to adjusting the current in the circuit.4) it is the resistor whose resistance is to going to be determined.

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A rheostat is a variable resistor made to control current. 

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What is the purpose of the rheostat in the resistance and resistivity experiment?


1) to limit the current in the circuit.

2) to overheat.

3) as an aid to adjusting the current in the circuit.

4) it is the resistor whose resistance is to going to be determined.