What are the advantages of the null-point method in a Wheatstone bridge? What additional measurements would be required to calculate by any other method?
Hint: The resistance can also be found using the current in the resistor.
Step 1:
The advantage of the null point method in a Wheatstone bridge is that the resistance of the galvanometer does not affect the balance point, there is no need to determine the current in resistances and the internal resistance of the galvanometer
It is an easy and convenient method for observers.
Step 2:
The can be calculated by applying Kirchhoff's rules to the circuit. We would need an additional accurate measurement of all the currents in resistances and galvanometer and internal resistance of the galvanometer.
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