Magnetism and Electricity

Front

What is magnetism?

Back

Magnetism is a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

Front

What is the role of a core in an electromagnet?

Back

The core, usually made of iron, enhances the magnetic field produced by the coil of wire.

Front

What is static electricity?

Back

Static electricity is the accumulation of electric charge on the surface of objects, which does not flow through a current.

Front

What is a compass?

Back

A compass is a device that uses a free-moving magnetic needle to show direction.

Front

What is the difference between AC and DC current?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction only.

Front

What happens when two like charges are brought together?

Back

Like charges repel each other.

Front

What happens when two opposite charges are brought together?

Back

Opposite charges attract each other.

Front

What is the formula for calculating the force between two electric charges?

Back

The force (F) between two charges can be calculated using Coulomb's Law: F = k * (|q1 * q2| / r^2), where k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.

Front

What is a magnetic field?

Back

A magnetic field is the region around a magnet where magnetic forces can be observed.