Any questions relating to your entries should be referred to your Centres C date Details Three batteries and three identical resistors are connected in a circuit POR, as shown 36 0093 + 8.BV - R Date of With PrivateKH Nationanin Enighed first tammiage? R R P-Q= 8 4- 6 3 = 2.1 84V 6 3V Entries Canfifionion Code / Syllabus anit Con Option GUE The batteries have negligible internal resistance 8.4 6. What is the potential difference between points P and Q? A 15V B 21V C 7.1V D 12.1V 37 782 A cell E. of electromotive force (e.m.f.) 2 V and negligible internal resistance. is connected to a uniform resistance wire of resistance 102 and length 1.0m. Cambadge has only con with the status Complete If any amendme submitted a new Electronic Sintang av Ed to be generated to nillect "av changed Any questions miating to your entries referred to your Centre R3 Candidate Details R: 10 0 Camolifant Name L= 1m Candidati bumper DO93 Status (School or Private Priv resistance wire U= 8mV= 0.008V U= 0CO08 V Z is a connection that may be made at any position along the resistance wire. A galvanometer is connected between Z and a point Q. Exam Dien Time A new source of e.m.f. of approximately 8mV is connected between points P and Q. The e.m.f. of is zero. the new source is determined by changing the position of Z until the reading on the galvanometer 2:0 be obtained? Which change to the circuit allows a much more precise value for the e.m.f. of the new source to A Add a resistor of resistance 0.1 (2 in series with cell E. By Add a resistor of resistance 1000 (2 In series with cell E. C Add a resistor of resistance 102 in series with the new source. D Add a resistor of resistance 800$2 in series with the new source