Problem 12-58 Resistor network - C

Diagram of circuit.

In the Figure, what is the
(a) current through the \(150 \Omega\) resistor?
(b) potential difference across the \(250 \Omega\) resistor?
(c) current through the \(350\Omega\) resistor?
(d) potential at \(\text{point A}\) (assuming zero potential at the negative terminal of the battery)

[Ans. (a) \(0.057 \;A\)   (b) \(14 \;V\)   (c) \(0.035\; A \)  (d) \(21 \;V\) ]

Correct! These two form a parallel pair of resistors.

If the equivalent resistance of this pair is \(R'\) then which expression gives \(R'\) ?

(A)   \(1/R' = 1/350 + 1/550\)

(B)    \(R' = 350 + 550\)