Question 1

Marks: 1

Which is the correct unit for electromotive force?

Newton, N
Ampere, A
Volt, V
Coulomb, C

Key Concepts

Electromotive Force

Question 2

Marks: 1

A cell has an emf of 5 V and internal resistance 5 Ω and is connected to a lamp of resistance 200 Ω. What is the current in the cell?

0.10 A
0.050 A
0.025 A
0.024 A

Key Concepts

Internal Resistance

Question 3

Marks: 1

Which statement correctly describes internal resistance?

The internal resistance of a cell is measured in amperes.
When the internal resistance is zero, the terminal pd of a cell is equal to its emf.
Internal resistance of a cell is due to resistance in the circuit wires.
Internal resistance within a cell increases its emf.

Key Concepts

Internal Resistance

Question 4

Marks: 1

Which graph correctly shows the variation of terminal potential difference V of a cell with current I ?

Key Concepts

Internal Resistance
Terminal Potential Difference

Question 5

Marks: 1

A graph showing the variation of terminal potential difference V of a cell with the current I flowing through it is shown:

q5_electromotive-force--internal-resistance_aqa-as-physics-mcq

Which line identifies the quantity which is represented by the magnitude of the slope of the graph?

The internal resistance of the cell.
The terminal potential difference provided by the cell.
The current through the cell.
The external resistance in the circuit.

Key Concepts

Electromotive Force
Internal Resistance

Question 6

Marks: 1

In a circuit-building investigation, two rechargeable 1.5 V AA batteries and one non-rechargeable 9.0 V C battery are used. What types of cells are these?

	rechargeable 1.5 V AA	non-rechargeable 9.0 V C
A.	primary cell	primary cell
B.	primary cell	secondary cell
C.	secondary cell	primary cell
D.	secondary cell	secondary cell

Key Concepts

Primary & Secondary Cells

Question 7

Marks: 1

Primary and secondary cells both transfer energy due to the movement of electrons between the positive and negative terminals of the cell.

Which row correctly identifies the direction of flow of electrons when the cell is in use, powering a circuit?

	primary cell	secondary cell
A.	from negative to positive	from positive to negative
B.	from negative to positive	from negative to positive
C.	from positive to negative	from negative to positive
D.	from positive to negative	from positive to negative

Key Concepts

Primary & Secondary Cells

Question 8

Marks: 1

For the discharge curve shown, which line most closely describes the discharging voltage of the cell over time?

5-3-q8-sl-easy-mcq-phy

	at start of use	during most use	at end of use
A.	slow	fast	plateaus
B.	fast	plateaus	fast
C.	plateaus	plateaus	fast
D.	fast	slow	slow

Key Concepts

Terminal Potential Difference

Question 9

Marks: 1

Three discharge curves are shown, for three identical cells. The cells are connected to three different circuits, I, II and III.

By interpreting the graph, what can be said about the circuits?

5-3-q9-sl-easy-mcq-phy

Circuit I draws less current than circuit III
Circuit II includes an ammeter
Circuit I draws more current than circuit III
Circuit II includes a voltmeter

Key Concepts

Terminal Potential Difference

Question 10

Marks: 1

Which of the following statements about the emf $ϵ$ of a cell is correct?

The emf is measured in Newtons
$ϵ = I R + I r^{2}$ , where R is the load resistance and r is the internal resistance
$ϵ$ is the amount of chemical energy transferred to electric energy, per unit of charge through a cell
The emf of a cell is always less than its terminal – or output – potential difference

Key Concepts

Electromotive Force

DP IB Physics: HL

Topic Questions

5.3 Electric Cells

Question 1

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Question 2

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Question 3

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Question 4

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Question 5

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Question 6

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Question 7

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Question 8

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Question 9

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Question 10

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