Resistance in Parallel

            Let two resistances having terminals A, B and C, D as indicated in the figure

            If we connect A with C & B with D they are called to be connected in parallel.

            The corresponding of these two resistances will be

                              1/R_eq = 1/R₁ + 1/R₂= (R₁R₂)/(R₁+R₂)

            If N resistances are connected in parallel their corresponding will be

                              1/R_eq =1/R₁+1/R₂+1/R₃+....+1/R_N

For Example

Solve the given circuit.

Solution:                      1k is in parallel having 1k Ω so

                                                R_eq = (R₁R₂)/(R₁+R₂ )

                                                        = 1/2

                                                       =0.5 k Ω