Revision NotesExam QuestionsPast Papers
International A LevelPhysicsEdexcelExam Questions2. Waves & ElectricityE.M.F & Modelling Resistance

E.M.F & Modelling Resistance (Edexcel International A Level Physics)

Exam Questions

22 mins5 questions

Select a question set to download for
E.M.F & Modelling Resistance

Select an answer set to view for
E.M.F & Modelling Resistance

Medium
Hard
1a
Sme Calculator4 marks

A student connected the circuit shown. The battery has negligible internal resistance.

q14-wph12-02-june-2021-edexcel-int-as-a-level-phy

The graph shows how the resistance of the thermistor varies with temperature.

q14-1-wph12-02-june-2021-edexcel-int-as-a-level-phy

The reading on the voltmeter is 3.42 V. Determine the temperature of the thermistor.

Temperature = ..........................

How did you do?

1b
Sme Calculator4 marks

The student suggests that if the e.m.f. of the battery is doubled, the reading on the voltmeter will double.

Assess whether the student’s suggestion is correct.

How did you do?

Did this page help you?

1a
Sme Calculator5 marks

A cell of e.m.f. ε is connected in series with a variable resistor with resistance R as shown. The internal resistance of the cell is r.

q17-wph12-02-oct-2021-edexcel-int-as-and-a-level-phy

When R is 12 Ω, the reading on the ammeter is 107 mA. The circuit is switched on for 300 seconds. In this time, 50 J of energy is transferred by the cell.

Calculate r.

r = .......................................................

How did you do?

1b
Sme Calculator2 marks

Increasing R would make the terminal potential difference value closer to ε.

Explain why, without further calculation.

How did you do?

1c
Sme Calculator4 marks

A voltmeter is added to the circuit as shown.

q17c-wph12-02-oct-2021-edexcel-int-as-and-a-level-phy

Explain how this circuit can be used to determine a value for r using a graphical method.

How did you do?

Did this page help you?