Electricity and Magnetism Flashcard

Front

What is the inverse square relationship in physics?

Back

The inverse square relationship states that a physical quantity is inversely proportional to the square of the distance from the source. For example, the magnetic force decreases with the square of the distance between two magnets.

Front

What is electric current?

Back

Electric current is the flow of electric charge, typically measured in amperes (A). It runs from the positive terminal to the negative terminal in a circuit.

Front

What direction do electrons move in a wire?

Back

Electrons move from the negative terminal to the positive terminal, which is opposite to the direction of conventional current.

Front

What is the shape of the magnetic field around a current-carrying wire?

Back

The magnetic field around a current-carrying wire forms concentric circles.

Front

What is potential difference?

Back

Potential difference, or voltage, is the difference in electric potential energy per unit charge between two points in a circuit.

Front

What is a magnetic field?

Back

A magnetic field is a region around a magnetic material or a moving electric charge within which the force of magnetism acts.

Front

What is ferromagnetism?

Back

Ferromagnetism is a property of certain materials (like iron) that can become magnetized and retain their magnetism even after the external magnetic field is removed.

Front

What is the role of a battery in an electric circuit?

Back

A battery stores chemical energy and converts it into electrical energy, providing a potential difference that drives electric current through the circuit.

Front

What is the relationship between distance and magnetic force?

Back

The magnetic force between two magnets decreases as the distance between them increases, following an inverse square relationship.

Front

What is the function of a compass in relation to magnetic fields?

Back

A compass needle aligns itself with the Earth's magnetic field, indicating the direction of the magnetic field lines.