Write the expression for magnetic Lorentz force.

A short straight conductor carries current I. Write the expression for magnetic field due to this conductor

A steel ball of radius 1 mm is falling vertically through a tank of oil at 30°C . Write down the expression for resultant force acting on the ball?

Write the expression for the torque experienced by the loop in a magnetic field in vector form.

A hydrogen ion of mass 'm' charge 'q' travel with a speed 'v' along a circle of radius 'r' in uniform magnetic field of flux density 'B". Obtain an expression for the magnetic force on the ion and determine its time period?

Write the expression for the efficiency of a Carnot engine.