Chapter 3

a) Current electricity and Ohm’s Law

b) Drift velocity of electron and resistance

c) Electric current density

d) Relation between conductivity and current density

e) Conductivity in terms of Relaxation time

f) Mobility of electrons

g) limitations of ohm’s law or Non-ohmic devices

h) electrical resistivity and its temperature dependence

i) Resistance connected in series

j) Resistance connected in Parallel

k) relation between emf, internal resistance and terminal potential difference of a cell

l) Cells connected in Series

m) Cells connected in Parallel

n) Kirchhoff’s Rules: junction rule, loop rule and sign convention in Kirchhoff's loop rule

o) Wheatstone bridge Principle

p) Meter bridge: how to determine unknown resistance

q) Potentiometer: working principle

r) Potentiometer and determination of internal resistance of a cell

s) Electrical heating or electrical work

t) Electric power: definition and formula