i) One important difference between the Joule effect and Peltier effect is that Joule effect takes place throught out the metal with the production of heat whereas Peltier effect takes place only at junction with either production or absorption of heat.
(ii) In formula Bm = BH tan θ
Bm → Magnetic field produced by the magnet placed on one of the arms of the deflection magnetometer.
BH → Horizontal component of Earth’s magnetic
field.
Obtain the formula, I = k θ for a moving coil galvanometer, given, the deflecting torque where m is the magnetic dipole moment of the coil placed in the magnetic field B, I is the current in the galvanometer and θ is the deflection.
(i) Define the terms magnetization (M) and magnetic susceptibility (xm).
(ii) What is the value of the magnetic susceptibility of aluminium if its relative permeability is 1.000022 ?