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What is the purpose of the rheostat in this experiment? 1) tolimit the current in the circuit. 2) to overheat. 3) as an aid toadjusting

What is the purpose of the rheostat in this experiment? 1) tolimit the current in the circuit. 2) to overheat. 3) as an aid toadjusting the current in the circuit. 4) it is the resistor whoseresistance is to going to be determined.

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3 and 4

1 and 2

1 and 3

4 only

2 and 3

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