Moderate# The Unknown Resistance

APPH12-PNZWXO

The circuit shown below consists of a battery of negligible internal resistance and two resistors,

(${R}_{1}= \text{ 6.0 Ohms and } {R}_{2}$). The resistance of the connecting wires is also negligible.

- The current entering point X in the circuit is 3.0 Amps.
- The current leaving point X and going into the lower 'branch' (containing ${R}_{2}$) is 1.0 Amp.

What is the value of ${R}_{2}$?