Unit 3: electricity
which direction does convection current flow?
which direction do electrons flow?
convection + to -
electrons - to +
what is dieect current?
current that flows in only one direction
for direct current what is thr energy of charged particles equal to?
E=qV
what is current?
the amount of charge that passes through a point in a period of time
what is ohms law?
states rhat electric current is propotional to voltage and is inversley proportional to resistance
explain resistivity
all components of a circiut contain some resistance
the formula for resistance in a wire is R=p(l/a) explain the parts
r= resistance
p= the resiticity
l= length pf wire
a= cross sectional area (a=pi r^2)