5 The resistance in the three arms of a Wheatstone bridge

Last updated: 6/24/2023

5 The resistance in the three arms of a Wheatstone bridge are respectively 15 10 0 and 22 5 2 When a copper coil is placed in the fourth arm of the bridge at 0 C the bridge remains balanced But to restore the balance of the bridge at 50 C of the coil temperature an additional resis tance r has to be arranged in parallel with the coil What is the value or r temperature coefficient of resistance of copper 0 00425 C 1