Electricity

What is electric current?

Electric current is the flow of electric charge, typically measured in amperes.

What are the two types of electric current?

The two types of electric current are direct current (DC) and alternating current (AC).

What does alternating current (AC) mean?

Alternating current is an electric current that reverses direction periodically.

What does direct current (DC) mean?

Direct current is an electric current that flows in one direction only.

What unit measures electric current?

Electric current is measured in amperes (A).

What instrument measures electric current?

An ammeter is used to measure electric current.

What is Ohm's Law?

Ohm's Law states that the current (I) through a conductor is directly proportional to the voltage (V) across it, and inversely proportional to the resistance (R).

What is resistance in electrical circuits?

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

What is the relationship between voltage, current, and resistance?

The relationship is defined by Ohm's Law: V = I * R.

What are conductors?

Conductors are materials that allow electric charges to flow easily through them, such as metals.

What are insulators?

Insulators are materials that resist the flow of electric charge, such as rubber or glass.

What is a circuit?

A circuit is a closed loop that allows electric current to flow.

What are series and parallel circuits?

In a series circuit, components are connected end-to-end; in a parallel circuit, components are connected across common points.

What is a short circuit?

A short circuit occurs when electricity flows along an unintended path, often causing excessive current flow.

What is voltage?

Voltage, or electric potential difference, is the force that pushes electric charges through a circuit, measured in volts (V).

What is a capacitor?

A capacitor is a device that stores electrical energy in an electric field.

What effect does increased resistance have on current?

Increased resistance decreases the current flowing through a circuit, according to Ohm's Law.

Lamp

Gives out light

Ammeter

Measures current

Open switch

Stops the flow of current

Closed switch

Starts the flow of the current

Buzzer

generates sound through the transmission of electrical signals