Electrical quantities - what can we measure? There are many electrical quantities that can be measured. This resource will deal with only the important basics. Summary of electrical quantities Quantity Measure Symbol Measured Unit (used in with: (used in equations & Voltage volt (V) V (or E) voltmeter Current amperes A (or I) amp or meter ‘amps’ (A) Resistance Ohms R Ω (Greek letter, omega) Basic electrical circuits There are two basic automotive circuits: series parallel. Parallel circuits A parallel circuit is a circuit in which the current has more than one current path. Figure 43: Parallel circuit
Electrical quantities - what can we measure? There are many electrical quantities that can be measured. This resource will deal with only the important basics. Summary of electrical quantities Quantity Unit (used in Symbol (used in equations & Measured with: Voltage volt (V) V (or E) voltmeter Current amperes or ‘amps’ (A) A (or I) amp meter Resistance Ohms Ω (Greek letter, omega) R Basic electrical circuits There are two basic automotive circuits: series parallel. Parallel circuits A parallel circuit is a circuit in which the current has more than one current path. Figure 43: Parallel circuit Measure
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