Question

three resistors each of resistance 12 ohms are connected in parallel.what is the equivalent resistance

Answer 1

1/equivalent resistance in parallel combination = 1/12+1/12+1/12
                                                                            =1+1+1/12
                                                                             =3/12
                                                                             =1/4
  therefore, equivalent resistance in parallel combination = 4    

Answer 2

Answer:

1/R=1/12+1/12+1/12

1/R=3/12

1/R=1/4

1/R=1/4

R=4