basic

Magnetic flux and flux density

Magnetic flux is the amount of magnetic field (or the number of lines of force) produced by a…

Magnetic circuits

Magnetic fields A permanent magnet is a piece of ferromagnetic material (such as iron, nickel or cobalt) which…

Capacitance

Capacitors Every system of electrical conductors possesses capacitance. For example, there is capacitance between the conductors of overhead…

Capacitors and capacitance

Electrostatic field Figure 6.1 represents two parallel metal plates, A and B, charged to different potentials. If an…

Parallel networks

Potential divider

The voltage distribution for the circuit shown in Figure 5.5(a) is given by

Series and parallel networks

Primary cells

Primary cells cannot be recharged, that is, the conversion of chemical energy to electrical energy is irreversible and…

Corrosion

Corrosion is the gradual destruction of a metal in a damp atmosphere by means of simple cell action.…

Chemical effects of electricity

A material must contain charged particles to be able to conduct electric current. In solids, the current is…