Electric Current & Ohm's Law P1

Front

What is the unit for measuring electric current?

Back

The unit for measuring electric current is the ampere.

Front

What is the voltage supplied by most electrical outlets in the U.S.?

Back

Most electrical outlets in the U.S. supply a voltage of 120 Volts.

Front

What type of energy transformation occurs in a generator?

Back

In a generator, the energy transformation is Source EMR --> e- (electromagnetic radiation to electrons).

Front

What type of energy transformation occurs in a light bulb?

Back

In a light bulb, the energy transformation is User e- --> EMR (electrons to electromagnetic radiation).

Front

Define electric current.

Back

Electric current can be defined by 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 through a conductor between two points is directly proportional to the voltage across the two points.

Front

What is resistance in an electrical circuit?

Back

Resistance is a measure of the opposition to the flow of electric current, measured in ohms.

Front

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

Back

The relationship is defined by Ohm's Law: V = I × R, where V is voltage, I is current, and R is resistance.

Front

What does a voltmeter measure?

Back

A voltmeter measures the voltage across two points in an electrical circuit.

Front

What does an ammeter measure?

Back

An ammeter measures the electric current flowing through a circuit.