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Q.

In the experiment to verify Ohm’s Law, rheostat is used to vary


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a

Voltage of the cell

b

Resistance of the circuit

c

Direction of the current

d

Resistance of the resistor 

answer is B.

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Detailed Solution

In the experiment to verify Ohm’s Law, rheostat is used to vary resistance of the circuit.
The instrument that is used to verify ohm's law is the rheostat. A rheostat provides a variable resistance. So a rheostat is an instrument that is used to change the resistance so we can observe different current results while keeping the voltage constant. And this instrument is mostly seen in physics lab classes.
 
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