Question

An electric circuit is given in the Figure.

The potential difference between A and D is 40 V.

1. Find the effective resistance between A and D in terms of R.

2. Calculate the potential difference between A and O.

Answer 1

1.  R_eff = \(\frac{R}{3}+R=4\frac{R}{3}\)

2.  V_AD = V_AO + V_OD

But V_OD = 3V_AO 

∴ V_AD = V_AO + 3V_AO

40 = 4V_AO

V_AO = \(\frac{40}{4}\) = 10V