Sensing 0.0 / 5 ? PhysicsD.C. ElectricityASOCR Created by: IssyCreated on: 26-09-17 21:55 What is power? The rate at which a component converts electrical energy into other engy types 1 of 21 What is current? The rate of flow of charged particles 2 of 21 What is potential difference? The energy per unit charge 3 of 21 What is resistance? How difficult it is for current to flow 4 of 21 Why does resistance occur? resistance is caused by electrons colliding with aoms and losing energy to other forms 5 of 21 What is ohm's law? If external factors are constant current is directly proportional to p.d in an ohmic conductor 6 of 21 Which equation isn't correct R=resistivity/AL 7 of 21 What is the equation for total resistance in series? Rtotal=R1+R2+R3... 8 of 21 what is the realtionship between conductance and resistance? Inverse 9 of 21 What does conductance depend on? A material's number density of mobile charge carriers -number of free charged particles per m^3 10 of 21 What direction does conventional current flow in? Positive to negative terminal of a power supply 11 of 21 What equation is incorrect? V=E.M.F+v 12 of 21 How do you calculate the total E.M.F in a series circuit? E.M.F1+E.M.F2+E.M.F3.... 13 of 21 What is emf? The elctro-motive-force, the amount of electrical energy the battery produces for each coulomb of charge 14 of 21 current entering a junction is... the same as the current exiting the junction 15 of 21 What is a potential divider? A circuit with a voltage source and a couple of resistors in series 16 of 21 What isn't a potential divider equation? V1/R2=V2/R1 17 of 21 What type of wave can be polarised transverse 18 of 21 What is bit rate? Bit rate=samples per second x number of bits in sample 19 of 21 What is signal duration? no of bits in signal/ bit rate 20 of 21 What isn't an equation for resolution? resolution=image height/object height 21 of 21
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