AS Equations

What do all these equations mean (e.g. whta do th letters stand for):

I=nAve I know its current = ? x Area x drift velocity x ?

(R_theta - R₀)/R₀ = a x theta
It was in resistance changing with temrature.

c(specific heat capaity) = VIt/M(delta)T

Reply 1

F1 fanatic

BlakDog

I = current
n=number of electrons/m^3
A=area
v=drift velocity
e = electron charge

V=voltage
I=current
t=time (giving you an electrical energy overall)
M=mass
deltaT=change in temperature.

I confess I'm not sure what the middle one is.

Reply 2

teachercol

n is the charge density ie the number of electrons(charge carriers) per metre cubed.
e is the charge = 1.6E-19 C

a is the temperature coefficient of resistance
theta here is the temperaure in Celsius

m in the last equation is massand deltaT is the change of temperature

These arent hard to look up!?