Available practice: 73 of 75 marks. Parts 7(a) await marking support. Scores cover available parts only. Theory Paper 2: Section A is compulsory and Section B offers a choice of two questions. Four published mark-scheme discrepancies across the two variants are held from automatic marking.
(a)(i)In the series circuit of Fig. 8.1, state the relationship among the battery current IB, fixed-resistor current I1 and variable-resistor current I2.
[1 mark]
(a)(ii)In the series circuit of Fig. 8.1, state an equation relating battery p.d. VB to p.d.s V1 and V2 across the two resistors.
[1 mark]
(b)The series circuit in Fig. 8.1 has a 9.0 V battery, a fixed 1000 Ω resistor and a variable resistor R set to 500 Ω. Calculate the current through R.
Answer guidance
Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.
[2 marks]
5054/21/M/J/16Cambridge O Level Physics 5054 · May/June 2016 · Paper 2 variant 1 · Question 8