Electricity & Magnetism

Front

What is an electric cell?

Back

An electric cell is a device that converts chemical energy into electrical energy, providing a potential difference between its terminals.

Front

What is potential difference?

Back

Potential difference, also known as voltage, is the difference in electric potential between two points in a circuit, which drives the flow of electric current.

Front

What is the principle of a generator?

Back

A generator operates on the principle of electromagnetic induction, converting mechanical energy into electrical energy.

Front

What is the relationship between distance and electric field strength?

Back

The electric field strength between two charged objects increases as the distance between them decreases.

Front

What is a turbine?

Back

A turbine is a large wheel that rotates when pushed by steam, wind, or water, converting mechanical energy into electrical energy in a generator.

Front

What is current?

Back

Current is the flow of electric charge in a circuit, measured in amperes (A).

Front

What is resistance?

Back

Resistance is the opposition to the flow of electric current, measured in ohms (Ω).

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R): V = I × R.

Front

What is an electric circuit?

Back

An electric circuit is a closed loop that allows electric current to flow, consisting of a power source, conductors, and a load.

Front

What is the function of a light bulb in a circuit?

Back

A light bulb converts electrical energy into light and heat energy when current flows through it.