Mention any four precautions while doing an experiment to verify Ohm’s law?

Mention any four precautions while doing an experiment to verify Ohm’s law?
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Answer. All connections should be kept tight. The zero error in the ammeter and voltmeter should be noted down and taken into consideration while reading the measurement. The bare ends of the connecting wires should be rubbed and cleaned properly with sandpaper. The value of the current through the circuit should be kept as low as possible otherwise heating of the resistor occurs.
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