Magnetic Compass

Magnetic Compass

A magnetic compass is a navigational device which uses a pivoted permanent magnet to point towards Magnetic North. A much smaller plotting compass is sometimes used to plot the direction of lines of magnetic flux around a magnet. Strange but True: The North-pointing...

Resistance

Electrical resistance is the opposition by a material to the flow of electrical current when a potential difference is applied. A resistor is an electronic component designed to have a particular resistance value. The SI unit of resistance is the ohm. The unit is...

Fleming’s Left Hand Rule

Fleming’s Left Hand Rule allows the direction to be predicted of the force on a current carrying conductor, placed at right angles to a magnetic field. The first finger, second finger and thumb are first placed at right angles to each other. The first finger...

Capacitor Circuits

Capacitance Parallel Plate capacitor Capacitor Types and Applications Charge and Current Charge Stored by a Capacitor Capacitors in Parallel Capacitors in Series Energy stored in a capacitor Capacitive Reactance Related Topics Electric Field Concepts Electrical...

Magnetic Circuits

Concepts Properties of Magnetic Fields The Earth’s Magnetic Field Types of Magnetic Material Magnetic Flux Magnetic Flux Density Magnetomotive Force Magnetic Field Strength (or Magnetising Force) Permeability B-H Curve (Magnetisation curve) Reluctance Basic...

Permeability

Absolute Permeability (μ) is the ratio of magnetic flux density (B) to magnetic field strength (H). Hence, For a non magnetic material, the ratio of B/H is a constant. The permeability of a classical vacuum (an ‘ideal’ vacuum, neglecting quantum...