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 4.2.2 Electric current Question Bank

[Maximum number: 3]

A battery provides energy to an electric car.

(a)

The time taken for the car battery to be recharged from zero charge to full charge is 8.3 h . The charge is delivered to the battery by a charger with a current of 32 A .

Calculate the charge supplied by the charger.

charge =

[ 3 ]

[Maximum number: 1]

The diagram shows an electric circuit.

In which direction do free electrons flow around this circuit and what quantity does the ammeter measure?

direction of electron flow

quantity measured
by the ammeter

anticlockwise

charge passing each point
in the circuit per unit time

anticlockwise

total charge passing
through the ammeter

clockwise

charge passing each point
in the circuit per unit time

clockwise

total charge passing
through the ammeter

[Maximum number: 1]

A power source is connected to a resistor XY.

In which directions are the conventional current and the flow of free electrons through the resistor?

conventional

current

free electron

flow

X to Y

Y to X

X to Y

Y to X

[Maximum number: 1]

Which statement about electric current in a conductor is correct?

In a d.c. circuit, the electric current gradually decreases along the conductor.

In a d.c. circuit, the free electrons flow back and forth.

In an a.c. circuit, the electric current remains exactly the same all the time.

In an a.c. circuit, the flow of charge changes direction continually.

[Maximum number: 1]

An electric current in a copper wire is due to the flow of charge.
Which particles are moving along the wire?

$\alpha$ -particles

copper nuclei

electrons

protons

[Maximum number: 1]

In which circuit is the ammeter measuring the flow of charge through the lamp?

[Maximum number: 1]

A student draws graphs of an a.c. supply and a d.c. supply.

Which row shows the correct labels for W, X and Y ?

label of W

a.c. supply

d.c. supply

time

voltage

[Maximum number: 1]

Which graph of voltage against time shows an a.c. voltage?

[Maximum number: 1]

A lamp is connected to a cell.

Which circuit diagram shows the direction of conventional current I and also the direction of flow of electrons e ?

[Maximum number: 1]

Which row is correct?

definition of current I

direction of
conventional current

$I=\frac{\mathrm{Q}}{t}$

from positive terminal
to negative terminal

$I=\frac{Q}{t}$

from negative terminal
to positive terminal

$I=Q \times t$

from positive terminal
to negative terminal

$I=Q \times t$

from negative terminal
to positive terminal

0 selected

Question 1

Question 1(b)

Question 25

Question 25

Question 25

Question 26

Question 26

Question 26

Question 26

Question 27

Question 27