11.4 Chapter summary
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11.3 Alternating current
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11.4 Chapter summary (ESCQG)
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Electrical generators convert mechanical energy into electrical energy.
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Electric motors convert electrical energy into mechanical energy.
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There are two types of generators - AC and DC. An AC generator is also called an alternator.
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There are two types of motors - AC and DC.
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Alternating current (AC) has many advantages over direct current (DC) listed previously.
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The root mean square (rms) value of a quantity is the maximum value the quantity can have divided by \(\sqrt{\text{2}}\).
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RMS values are used for voltage and current when dealing with alternating current, \(I_{\text{rms}} = \dfrac{I_{\text{max}}}{\sqrt{\text{2}}}\) and \(V_{\text{rms}} = \dfrac{V_{\text{max}}}{\sqrt{\text{2}}}\).
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The average power dissipated in a purely resistive circuit with alternating current is \(P_{av}=I_{rms}V_{rms}\).
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11.3 Alternating current
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