The video tutorial explains the physics behind electric fans, focusing on the conversion of electrical energy into mechanical energy through the magnetic effect of electricity. It highlights the role of electric motors in this process, detailing their components and how they function to rotate fan blades. The tutorial also discusses the practical applications of electric motors in everyday appliances.

What is the primary function of an electric fan?

• To generate heat

• To convert electrical energy into mechanical energy

• To store electrical energy

• To convert mechanical energy into electrical energy

What is at the core of an electric motor's operation?

• A chemical reaction

• A magnetic field

• A thermal process

• A hydraulic system

Which component of the electric motor is responsible for interacting with the magnetic field?

• The current-carrying coil

• The fan blades

• The carbon strips

• The battery

What role do the carbon strips play in an electric motor?

• They cool the motor

• They store energy

• They act as brushes

• They generate electricity

How is the direction of force on the coil determined in an electric motor?

• By the speed of the motor

• By the type of battery used

• By the direction of current flow

• By the size of the fan blades

What happens when the current flow in the coil is reversed?

• The motor speeds up

• The motor stops

• The direction of force is reversed

• The fan blades detach

What is the result of the continuous rotation of the coil in an electric motor?

• The motor stops

• The motor overheats

• The fan blades rotate

• The motor generates sound