On which principle does an electric motor work?

An electron enters a uniform magnetic field at right angles to it as shown in the figure below. In which direction will this electron move? State the rule applied by you in finding the direction of motion of the electron.

$(a)$ Name two electrical appliances of daily use in which an electric motor is used.
$(b)$ Name and state the principle on which an electric motor works.

$(a)$ Describe an experiment with a diagram to show that force is exerted on a current-carrying conductor when placed perpendicular in a magnetic field.
$(b)$ How will this force change if the current in the conductor is increased?
$(c)$ Name a device that uses the above principle.

Which instrument is used to convert electrical energy into mechanical energy?

Which is the direction of magnetic force acting on a current-carrying wire placed in a magnetic field?