Units of Electrical Measurement

Front

What happens to objects with opposite charges?

Back

They are attracted to each other, and the force between the objects pulls them together.

Front

What type of charge does a substance have if it has more electrons than protons?

Back

A negative charge.

Front

What is the role of an energy source in a circuit?

Back

It provides the electrical energy needed for the circuit to function.

Front

How does resistance affect the flow of current in a circuit?

Back

More resistance results in less current.

Front

What is the name of the law that states the relationship between current, voltage, and resistance?

Back

Ohm's Law.

Front

What is the unit of electrical current?

Back

Ampere (A).

Front

What is the unit of voltage?

Back

Volt (V).

Front

What is the unit of resistance?

Back

Ohm (Ω).

Front

What is the formula for calculating electrical power?

Back

Power (P) = Voltage (V) × Current (I).

Front

What is the difference between a conductor and an insulator?

Back

A conductor allows electricity to flow easily, while an insulator resists the flow of electricity.