m 𝜏where 𝜏=relaxation timeE=electric fieldm=mass of electron
m 𝜏 E
Awhere, 𝜌=Resistivity of material
Mobility (𝜇) is defined as magnitude of the drift velocity per unit electric field.𝜇=| vd|
Ammeter: The resistance of Ammeter must be very small compared to other resistances in the circuit. A galvanometer can be converted into Ammeter by connecting a resistor of very low resistance R in parallel.
Voltmeter: A galvanometer can be converted into voltmeter by connecting a resistor of high resistance R in series.
QWhat is Specific resistance ASpecific resistance of a conductor is defined as the resistance offered by conductor per unit length and unit cross-sectional area when the known amount of voltage is applied.Specific Resistance=𝜌=RA
Lwhere,𝜌=Resistivity of materialR: resistanceA: cross-sectional areaL: length of the material
QWhich conservation principle is involved in Kirchoff’s second law?AKirchhoff’s second law or voltage law is a consequence of the law of conservation of energy.