The diagram shows a battery connected to two resistors

8The diagram shows a battery connected to two resistors. RFour students separately measure the electromotive force (e.m.f.) of the battery, the current in the resistors, and the potential difference (p.d.) across resistor R. Their results are shown in the table below. Which row shows values with their correct units? 9A3.0Ωresistor and a 6.0Ωresistor are connected in parallel. 6.0Ω3.0ΩWhat is their combined resistance? A0.50ΩB2.0ΩC4.5ΩD9.0ΩSave My Exams! – The Home of RevisionFor more awesome GCSE and A level resources, visit us at

10Which circuit shows the directions of the conventional current Iand the flow of electrons?

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11Four lamps are each labelled 240V. In which circuit do all four lamps have normal brightness?

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12A battery charger plugs into a 230V a.c. supply. The charger is used to charge a 6.0V d.c. battery. The charger contains diodes and a transformer. What is the purpose of these components?

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13The diagram shows a potential divider connected to two voltmeters P and Q. Vvoltmeter QVvoltmeter PThe resistance of the variable resistor is decreased. Which row shows what happens to the reading on each voltmeter? Save My Exams! – The Home of RevisionFor more awesome GCSE and A level resources, visit us at

14The diagram shows part of an electrical circuit. A4.0Ω3.0A2.0ΩThe current in the 4.0Ωresistor is 3.0A. What is the current in the ammeter? A 4.5A B 6.0A C 9.0A D 12.0A Save My Exams! – The Home of RevisionFor more awesome GCSE and A level resources, visit us at

15The circuit diagram shows a thermistor in a potential divider. A voltmeter is connected across the thermistor. VThe graph shows how the resistance of the thermistor changes with temperature. temperature resistance As the thermistor becomes warmer, what happens to its resistance and what happens to the reading on the voltmeter? 16What is the unit of electromotive force (e.m.f.)? A ampere B joule C volt D watt Save My Exams! – The Home of RevisionFor more awesome GCSE and A level resources, visit us at

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The diagram shows a battery connected to two resistors. Three ammeters M1, M2 and M3 are

connected in the circuit.

                           

Ammeter M1 reads 1.0 A.

What are the readings on M2 and on M3?