question_answer

  Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2  in series with a combination of two resistors (4  each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2   resistor be the same as that across the parallel combination of 4. Resistors? Give reason. [NCERT Exemplar]

Answer:

                  The circuit is shown in figure. Effective resistance of combination of two resistors (4  each) in parallel is Since the resistor of 2 . and parallel combination of two 4 resistors are in series, same current will flow through these. Hence the potential difference across 2  resistor is same as that across combination of two resistors.