Three resistors of 6Ω, 6Ω and 3Ω are connected in parallel across a cell of negligible internal resistance.
(a) State any one characteristic of the potential difference across the branches of a parallel circuit.
(b) Calculate the equivalent resistance offered by the three resistors 6Ω, 6Ω and 3Ω when connected in parallel.
(c) If three identical resistors, each of resistance RΩ, are connected in parallel, derive an expression for their equivalent resistance and comment on how this value compares with R.