# Electricity

9 cards

physics knowledge for primary FRCA

Created Dec 22, 2010
by
007wendy

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 Side A Side B 1 Coulomb Quantity of electric charge which passes some point when a current of 1A flows for 1second.... 2 Farad Capacitance of an object for which the electrical potential increases by 1V when 1 coulomb... 3 electrical energy e.g. defib Energy = Potential difference x Charge, stored energy = (1/2)VQ 4 Time constant (electricity) Resistance x Capacitance 5 Difference between impedance and resistance? Impedance depends on frequency, resistance does not 6 Capacitance, inductance and impedance and frequency Capacitance: impedance is proportional to 1/Freq, Inductance: impedance is proportional to... 7 rise time, fall time rise time: time for signal to rise from 10% to 90% (or any other set values), fall time: time... 8 response time (e.g CO2 analyser) time taken for unit to respond to a given input e.g. time from gas reaching chamber to displaying... 9 power (electrical). equation? power = current squared x resistance