Electric Current & Ohm's Law P1

Front

What is electric current?

Back

Electric current is defined as the flow of electric charge, typically measured in amperes (A). It represents the number of electrons passing through a cross-section of a conductor in one second.

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) of the conductor. It can be expressed as V = I × R.

Front

What is resistance in an electrical circuit?

Back

Resistance is a measure of the opposition to the flow of electric current in a conductor, measured in ohms (Ω). It determines how much current will flow for a given voltage.

Front

What are conductors?

Back

Conductors are materials that allow electric current to flow easily through them. Examples include metals like copper and aluminum.

Front

What are insulators?

Back

Insulators are materials that do not allow electric current to flow easily. Examples include rubber, glass, and plastic.

Front

What is the formula for calculating resistance?

Back

Resistance (R) can be calculated using the formula R = V / I, where V is voltage and I is current.

Front

What is voltage?

Back

Voltage, also known as electric potential difference, is the measure of electric potential energy per unit charge, measured in volts (V). It is the force that pushes electric current through a circuit.

Front

What is a circuit?

Back

A circuit is a closed loop that allows electric current to flow. It consists of a power source, conductors, and a load (like a light bulb or motor).

Front

What role do conducting wires play in a circuit?

Back

Conducting wires provide a path for electric current to flow between different components of a circuit, completing the circuit.

Front

What is a generator?

Back

A generator is a device that converts mechanical energy into electrical energy, typically using electromagnetic induction.