(1) An e.m.f. is induced in a conductor when the magnetic field surrounding it changes.
(2) The magnitude of the e.m.f. is proportional to the rate of change of the field.
(3) The sense of the induced e.m.f. depends on the direction of the rate of change of the field.

• solstice
• solubility
• solubility product
• solute
• solution
• solvation
• solvent
• sonar
• sonic boom
• sonometer
• sorption
• sorption pump
• sound
• source
• space
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• space-reflection symmetry
• space-time
• spallation
• spark
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• special theory of relativity
• specific
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