Question

Two resistances 2 ohm and 3
ohm are connected across the two gaps of the metre bridge as shown in figure. Calculate
the current through the cell when the bridge is balanced and the specific resistance of the material of the metre bridge wire. Given the resistance of the bridge wire is 1.49 ohm and its diameter is 0.12 cm.​

Answer 1

Answer:

Explanation:

A resistance of 2Ω is connected across one gap of a metre bridge ( the length of the wire is 100 cm) and an unknown resistance, greater than  2Ω , is connected across the other gap. When these resistance's are interchanged, the balance point shifts by 20cm

To find the unknown resistance

Solution:  

Given, R=2Ω

⟹x=3Ω

is the value of unknown resistance.