Solve this: In the circuit diagram given below, AB is a uniform wire of resistance 15 â ¦ and length - Physics - Current Electricity

Question

Solve this:
In the circuit diagram given below, AB is a uniform wire of
resistance 15 â„¦ and length I m It is connected
to a cell El of emf 2V and negligible internal
resistance and a resistance R The balance point with another cell
E2 of emf 75 mV is found at 30 cm from end A Calculate
the value of R

Vijay Shankar Yadav · Accepted Answer

Dear Student,
current in loop AXE2GA=current in loop AE1BA ( In steady state)E230100×15=E1R+15or R+15=E1×4
5E2=2×4 575×10-3=120or R=105ohm
Regard