If in the circuit below, the internal resistance of the battery is and V and 5 V are Ω P Q the potentials at P and Q respectively, what is the potential difference between the points P and Q
(1) Zero
(2) 4 volts (VP > VQ)
(3) 4 volts (VQ > VP)
(4) 2.5 volts (VQ > VP)
