Current, Voltage, and Resistance

Front

What is the formula to calculate current (I) in a circuit?

Back

I = V / R, where I is current in amperes, V is voltage in volts, and R is resistance in ohms.

Front

What is the unit of measure for voltage?

Back

The unit of measure for voltage is the volt.

Front

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

Back

Ohm's Law.

Front

If a circuit has a voltage of 120 volts and a resistance of 12 ohms, what is the current?

Back

10 A.

Front

What happens to the current if the resistance in a circuit increases while the voltage remains constant?

Back

The current decreases.

Front

What is resistance?

Back

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

Front

What type of material typically has low resistance?

Back

Conductors, such as metals like copper and aluminum.

Front

What type of material typically has high resistance?

Back

Insulators, such as rubber and glass.

Front

If a wire is made longer, what happens to its resistance?

Back

The resistance increases.

Front

If a wire is made thicker, what happens to its resistance?

Back

The resistance decreases.