C09 Electric Circuits

What’s on the Specification

P1.1

Electrostatics:

Know and understand that insulators can be charged by
friction.
Know and understand that charging is caused by gain or loss
of electrons.
Know and understand that like charges repel and unlike
charges attract.
Understand applications and hazards associated with
electrostatics, including the role of earthing.

P1.2

Electric circuits:

Know and recognize the basic circuit symbols and diagrams,
including: cell, battery, light source, resistor, variable resistor,
ammeter, voltmeter, switch, diode.
Understand the difference between alternating current (ac) and
direct current (dc).
Understand the difference between conductors and insulators,
and recall examples of each type.
Know and be able to apply:
$\text { current }=\frac{\text { charge }}{\text { time }}, I=\frac{Q}{t}$
Know and understand the use of voltmeters and ammeters.
Know and be able to apply:
$\text { resistance }=\frac{\text { voltage }}{\text { current }}, R=\frac{V}{I}$
Calculate the total resistance for resistor combinations in series.
Understand that the total resistance of a parallel combination is
less than that of any individual resistor.
Know and be able to apply:
$\text { voltage }=\frac{\text { energy }}{\text { charge }}, V=\frac{E}{Q}$
Know and be able to apply:
$\text { power }=\text { current } \text { × } \text { voltage, } P=I V=I^2 R$
Know and be able to apply:
$\text { energy transfer }=\text { power } \text { × } \text { time }, E=V I t$

Learning Objectives

Suggested Time

Practice:

Practice:

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ESAT Physics Interactive Coursebook (Online)