1. Motion, forces and energy

1.1 Physical quantities and measurement techniques

1.2 Motion

1.3 Mass and weight

1.4 Density

1.5.1 Effects of forces

1.5.2 Turning effect of forces

1.5.3 Centre of gravity

1.6 Momentum

1.7.1 Energy

1.7.2 Work

1.7.3 Energy resources

1.7.4 Power

1.8 Pressure

2. Thermal physics

2.1.1 States of matter

2.1.2 Particle model

2.1.3 Gases and the absolute scale of temperature

2.2.1 Thermal expansion of solids, liquids and gases

2.2.2 Specific heat capacity

2.2.3 Melting, boiling and evaporation

2.3.1 Conduction

2.3.2 Convection

2.3.3 Radiation

2.3.4 Consequences of thermal energy transfer

3. Waves

3.1 General properties of waves

3.2.1 Reflection of light

3.2.2 Refraction of light

3.2.3 Thin lenses

3.2.4 Dispersion of light

3.3 Electromagnetic spectrum

3.4 Sound

4. Electricity and magnetism

4.1 Simple phenomena of magnetism

4.2.1 Electric charge

4.2.2 Electric current

4.2.3 Electromotive force and potential difference

4.2.4 Resistance

4.2.5 Electrical energy and electrical power

4.3.1 Circuit diagrams and circuit components

4.3.2 Series and parallel circuits

4.3.3 Action and use of circuit components

4.4 Electrical safety

4.5.1 Electromagnetic induction

4.5.2 The a.c. generator

4.5.3 Magnetic effect of a current

4.5.4 Force on a current-carrying conductor

4.5.5 The d.c. motor

4.5.6 The transformer

5. Nuclear physics

5.1.1 The atom

5.1.2 The nucleus

5.2.1 Detection of radioactivity

5.2.2 The three types of nuclear emission

5.2.3 Radioactive decay

5.2.4 Half-life

5.2.5 Safety precautions

6. Space physics

6.1.1 The Earth

6.1.2 The Solar System

6.2.1 The Sun as a star

6.2.2 Stars

6.2.3 The Universe

IGCSE Physics 4.3.3 Action and use of circuit components Question Bank

[Maximum number: 1]

The diagram shows a circuit containing two resistors of resistance $1.0 \Omega$ and $2.0 \Omega$ .
A voltmeter is connected across the $1.0 \Omega$ resistor by connecting P to X .
The reading on the voltmeter is 6.0 V .

P is moved to point Y in the circuit.
What is the new reading on the voltmeter?

$3.0 \mathrm{~V}$

6.0 V

12 V

18 V

[Maximum number: 1]

P is moved to point Y in the circuit.
What is the new reading on the voltmeter?

$3.0 \mathrm{~V}$

6.0 V

12 V

$18 \mathrm{~V}$

[Maximum number: 1]

The diagram shows a circuit which includes two resistors and a battery.

The voltmeter reads 6.0 V .
What is the potential difference across the $30 \Omega$ resistor?

$2.0 \mathrm{~V}$

$6.0 \mathrm{~V}$

18 V

24 V

[Maximum number: 1]

Two resistors, with resistances $R_{1}$ and $R_{2}$ , are used as a potential divider.

What is the relationship between $R_{1}, R_{2}$ and potential differences $V_{1}$ and $V_{2}$ ?

$R_{1} \times R_{2}=V_{1} \times V_{2}$

$R_{1} \times V_{1}=R_{2} \times V_{2}$

$\frac{R_{1}}{R_{2}}=V_{1} \times V_{2}$

$\frac{R_{1}}{R_{2}}=\frac{V_{1}}{V_{2}}$

[Maximum number: 1]

The diagram shows two resistors used as a potential divider.

The reading on the voltmeter is 1.8 V .
What is the resistance of the resistor R?

$3.0 \mathrm{k} \Omega$

$3.3 \mathrm{k} \Omega$

$7.5 \mathrm{k} \Omega$

$13 \mathrm{k} \Omega$

[Maximum number: 1]

Which labelled component in the circuit shown controls the brightness of lamp X?

[Maximum number: 1]

The circuit shown can be completed by inserting components at X and at Y . The completed circuit is a potential divider in which the potential difference across component Y increases when the temperature increases.

Which row shows the components X and Y ?

light-dependent resistor

resistor

light-dependent resistor

resistor

thermistor

resistor

[Maximum number: 1]

Each potential divider is placed in a circuit with a power supply.
Which potential divider makes the potential difference (p.d.) across component Y increase when the light intensity increases?

[Maximum number: 1]

Each potential divider is placed in a circuit with a power supply.
Which potential divider makes the potential difference (p.d.) across component Y increase when the light intensity increases?

[Maximum number: 1]

The diagram shows a light-dependent resistor (LDR) connected in a potential divider circuit.

The brightness of the light falling on the LDR is increased.
Which row shows what happens to the resistance of the LDR, and what happens to the reading on the voltmeter?

resistance of LDR

reading on voltmeter

decreases

increases

decreases

increases

0 selected

Question 28

Question 28

Question 29

Question 29

Question 29

Question 30

Question 30

Question 30

Question 30

Question 30