at the microscopic scale, a material that has no long range order. eg, glass, the atoms form strong bonds with each other to make a rigid, irregular structure
amorphous
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a switching mechanism that reverses the connections to the coil of an electric motor to maintain its direction of rotation
commutator
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a current induced in the core of a transformer
eddy current
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the stress at which fracture occurs. Also called tensile strength
fracture stress
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resistance within a source of e.m.f. resulting in a drop of terminal p.d. when a current is drawn from the source
internal resistance
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the mass of 1 mol of any substance
molar mass
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a single 'picture element'. In a digital camera, a lens is used to form a real image on a chip with an array of the order of a million very small light-sensitive detectors, each of these corresponding to one * of the final image
pixel
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the square root of the mean square speed, used when quoting molecular speeds
root mean square speed
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a material has this property if it does not break by snapping cleanly, and if it absorbs a lot of energy before fracture when deforming plastically. This is the opposite of brittleness
tough
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Other cards in this set
Card 2
Front
a switching mechanism that reverses the connections to the coil of an electric motor to maintain its direction of rotation
Back
commutator
Card 3
Front
a current induced in the core of a transformer
Back
Card 4
Front
the stress at which fracture occurs. Also called tensile strength
Back
Card 5
Front
resistance within a source of e.m.f. resulting in a drop of terminal p.d. when a current is drawn from the source
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