II sem : 5. Experimental verification of series and parallel combination of resistances using multi-meter

Aim :  Experimental verification of series and parallel combination of resistances using multi-meter

Apperatus : Metal wire,ohm's law kit, various resistances, Multimeter

Formula:

    R  =   R1 + R2 + R3

     Rp  =  R1R2 / (R1 + R2)

Theory and Procedure: 

Resistance. The electrical resistance of a circuit  device is defined as the ratio of the voltage applied to the electric current which flows through it: If the resistance is constant over a considerable range of voltage, then Ohm's law, 

Resistances in Series : 

                      

         V =V1 + V2 + V3

            IR = IR1 + IR2 +IR3

                  = I(R1 + R2 +R3)

             R  =   R1 + R2 + R3

Resistances in Parallel : 

         I = I1 + I2 

       V/Rp = V/R1 + V/R2

           V/Rp = V(1/R1 + 1/R2)

       1/Rp = 1/R1 + 1/R2

                   Rp = R1R2 / (R1 + R2)

Result : Experimentally series and parallel combination of resistances  have been verified using multi-meter.