In a meter bridge, the balance point is found to be 40 cm from one end (say end A). If a resistance of 10 ohm is connected in series with R, a balance point is obtained 60 cm from end A. What are the values of R and S (S is other resistance in series with R)?
You have two 100 Ohm 10% resistors in parallel, then series connected to a 50 Ohm 5% resistor. What is the total resistance and its percent error?