Question

In your own words, explain magnetic fields, forces, and give examples in daily life.

In your own words, explain the workings of direct current motors.

In your own words, explain current loops and solenoids.

Answer 1

Magnetic field: A magnetic field is a vector field in the neighbourhood of a magnet, electric current, or changing electric field, in which magnetic forces are observable.

Example: Compass can show direction due to the magnetic field

Magnetic force: Magnetic Force can be defined as the attractive or repulsive force that is exerted between the poles of a magnet and electrically charged moving particles.

Example: The magnets that hold stuff on the refrigerator, train tracks, and new roller coasters

Direct Current Motors:

The working of DC motor is based on the principle that when a current carrying conductor is placed in a magnetic field, it experiences a mechanical force. Thed of the mechanical force is given by Fleming’s Left hand Rule and its magnitude is given by F = BIL Newton.

Current Loops: A current loop is an electrical setup that uses two conductors to send signals to a device

Solenoid: A solenoid is a long coil of wire wrapped in many turns. When a current passes through it, it creates a nearly uniform magnetic field inside. They convert electric current to mechanical action, and so are very commonly used as switches