Answer to Question #73952 in Physics for Ayrill

Question

1. A two-metre potentiometer wire is used in an experiment to determine the internal resistance of a voltaic cell. The e.m.f of the cell is balanced by the fall of potential along 90.6cm of wire. When a standard resistor of 10 0hms is connected across the cell the balance length is found to be 75.5cm . Draw a labelled circuit diagram and
calculate from first principles, the internal resistance of the cell.

2. A 2UF capcitor charged originally to a potential difference of 60v is
discharged across a 22mΩ resistor as shown in the figure. Calcualte
the time constant of the ccircuit and the potential differnce across the
capacitor after this time constant time?

3. Find the current in every branch of the two loop circuit.