How is the speed of em-waves in vacuum determined by the electric and magnetic fields?

At a place, the horizontal component of earth’s magnetic field is B and angle of dip is 60^o. What is the value of horizontal component of the earth’s magnetic field at equator?

Name the junction diode whose I-V characteristics are drawn below:

How does Ampere-Maxwell law explain the flow of current through a capacitor when it is being charged by a battery? Write the expression for the displacement current in terms of the rate of change of electric flux.

Define the distance of closest approach. An α-particle of kinetic

energy ‘K’ is bombarded on a thin gold foil. The distance of the closest

approach is ‘r’. What will be the distance of closest approach for an

α-particle of double the kinetic energy?

OR

Write two important limitations of Rutherford nuclear model of

atom.