4.2.3 Electromotive force and potential difference
4.2.3.2—E.m.f. is measured in volts (V)
4.2.3.3—Potential difference (p.d.) as the
4.2.3.4—P.d. between two points is measured in
4.2.3.5—Use of voltmeters (analogue and
4.2.3.6—E.m.f.: E = W/Q
4.2.3.7—P.d.: V = W/Q
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