conversion of galvonometer into ammeter and voltmeter

This video gives complete explanation about how to convert galvonometer into ammeter and voltmeter

principle of shunt resistance

Shunt resistance should be connected in the circuit to save the galvonometer from very large currents and it is connected to moving coil galvonometer in parallel manner.

moving coil galvonometer

Moving coil galvonometer depends upon the principle that  a current carrying coil rotated itself when placed in a magnetic field. In this galvonometer, the deflection torque and restoring torque are equal

Force and Torque on a current loop in a magnetic field

This video tells about the effect of magnetic field when a current loop placed in a strong magnetic field and also explains about torque which acts as a deflecting torque on the current loop.

Fleming's Left hand Rule

This video explains about Fleming's Left hand Rule.

Force between two parallel conductors carrying current

• Ampere showed that two parallel conductors carrying currents in the same direction have attractive force between them and carrying currents in opposite direction have repulsive force.

Biot-Savart law

This video explains about the Biot-Savart law remaining part of previous session.

Ampere's law and Biot-Savart law

• Ampere showed that if a continuous closed line or loop can be drawn round the current carrying conductors or conductor  and B is the magnetic induction in the direction of an element dl of the loop, then line integral of  B.dl=Uoi
• Biot-Savart law is applied for the curved current carrying conductor, on the other hand Ampere's law is applied for the uniform current carrying conductor.

     

Introduction to electromagnetics

In this video, i have discussed about the fundamental of electromagntetics and rules for the relation between the current and magnetism

Thomson effect and its explanation

• Thomson effect is improvised effect on Peltier effect.
• When current flows through thermo couple, then heat energy is evolved or absorbed not only at junctions, but it is absorbed or evolved  all along one or both the conductors.
• Thomson coefficient is nothing but the heat energy is evolved or absorbed  when a current of 1A flows for one second between two points of a conductor which differ in temperature of one degree centigrade.

Peltier effect and its explanation

• Peltier effect is converse of Seebeck effect.
• When a current is passed across the junctions of two dissimilar metals, then heat is evolved at one junction and heat is absorbed at another junction. This effect is called Peltier effect.
• Peltier effect is reversible where as Joule's heat effect is irreversible
• The amount of heat evolved or absorbed at junctions is called Peltier coefficient.

Thermo galvonometer and its explanation

This video tells about how the thermo galvonometer and it works and on what principle it depends

Thermo electricity and seebeck effect

•  According to Joule's law, the current passing through a resistor produces heat
• Seebeck is a scientist who discovered that heat energy can be converted into electric energy
• Seebeck  discovered that when two dissimilar metals  are joined to form a closed circuit with junctions and if the junctions are kept at different temperatures an emf is generated and current flows through the circuit.