**1. State the Tangent law. Describe the setting and working of deflection magnetometer.**

**2. State the Curie’s law and explain the properties of dia, para and ferromagnetic substances based on magnetization (M), susceptibility ( m) and magnetic permeability.**

**3. Derive the relation between relative permeability and magnetic susceptibility (m)**

**4. Derive the expression for torque on a Bar magnet: Torque = M x B**

**5. Calculate the magnitude of force acting on an electron moving with a velocity 3 x 10**

^{7}m/s at right angles to a magnetic field of 10T. (4.8 x 10^{-11}N)**6. An electron moving with velocity 5 x 10**

^{7}m/s enters a magnetic field of 1 NA^{-1}m^{-1}at angle 30^{0}to the field. Calculate the force on the electron. (4 x 10^{-12}N)