12 exam-style questions (50 marks) in three tiers. Try each one on paper first, then check the model answer and mark scheme.
Chapter 5 notes12 questions · 50 marks
Showing 12 of 12 questions
Recall and simple application
Name the meter connected in series and the meter connected in parallel.
State the current rule for a series circuit.
State the p.d. rule for a parallel circuit.
Calculate the effective resistance of a 2.0 Ω and a 5.0 Ω resistor in series.
Structured, exam-style
Two identical lamps are connected in series across a 12 V battery. (a) State the p.d. across each lamp. (b) One lamp is removed and replaced by a wire. State and explain the new p.d. across the remaining lamp.
A 12 V supply feeds two parallel branches of 4.0 Ω and 12 Ω. Calculate the current in each branch and the total supply current.
A 3.0 Ω and a 6.0 Ω resistor are in series across a 9.0 V battery. Calculate the current, and the p.d. across each resistor.
Explain why a home’s lamps are wired in parallel rather than in series.
Data, evaluation and explanation
A 12 V battery drives a 3.0 Ω resistor in series with a parallel pair of two 6.0 Ω resistors. Calculate (a) the effective resistance of the pair, (b) the total resistance, (c) the supply current, (d) the p.d. across the parallel pair.
A series circuit draws 1.0 A from a 15 V supply and contains a 10 Ω resistor plus an unknown resistor R. Calculate R.
Two 6.0 Ω lamps connect to a 12 V battery, first in series, then in parallel. For each arrangement calculate the current through one lamp and the total current from the battery.
A 12 V battery drives a 4.0 Ω resistor in series with an 8.0 Ω resistor. A switch then connects a second 8.0 Ω resistor in parallel with the first 8.0 Ω. Calculate (a) the current before the switch closes, (b) the p.d. across the 8.0 Ω resistor at that time, (c) the total resistance and supply current after the switch closes.
Next step
A 30-mark paper set out like a school paper, with a separate mark scheme. Give yourself 40 min.
Question paper
30 marks · 40 min · 4 pages
5 multiple-choice questions and structured questions with answer lines. Chapter 5 (circuit symbols — cells, switches, lamps, LEDs, resistors, fuses, meters; series and parallel rules for current and p.d.; effective resistance formulae; whole-circuit R = V/I).
Mark scheme
PROAnswers · Marking points · 2 pages
Model answers with a mark for each creditworthy point — for marking at home or in class.