| 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:
$\text { energy transfer }=\text { power } \text { × } \text { time }, E=V I t$
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