question_answer 63)

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

Answer:

                  The circuit diagram containing a cell, a key, a resistor of  in series with a combination of two resistors ( each) in parallel and a voltmeter across the parallel combination is shown below The resistance of parallel combination of two resistors (each) is . The same current passes through the  resistor and  (equivalent of two parallel resistor of ). So, voltage drop by them will be same, hence the voltage V is same across resistor and the parallel combination of two resistors, cell of .