Which of the following statements is false with reference to Wheatstone bridge?
1
It is used for finding value of unknown inductance, capacitance by making certain changes to the circuit.
2
The essential components are two known resistances, power supply, variable resistance, a galvanometer and the unknown resistor.
3
It can be used along with other systems to measure physical parameters like strain, light and temperature.
4
Full scale deflection of galvanometer indicates null balancing of Wheatstone bridge.