Understanding Power in Electrical Circuits

What is the formula for electrical power in terms of current and voltage?

• Power = Voltage / Current

• Power = Current / Resistance

• Power = Current x Voltage

• Power = Voltage x Resistance

In a series circuit, if the total resistance is 15 ohms and the current is 2 amps, what is the total power dissipated?

• 30 watts

• 60 watts

• 90 watts

• 120 watts

How much energy is dissipated in a circuit with 60 watts of power over one hour?

• 180,000 joules

• 240,000 joules

• 360,000 joules

• 216,000 joules

Why do parallel circuits produce more power than series circuits with the same resistors?

• Series circuits have more voltage drop.

• Parallel circuits have more current.

• Each resistor in parallel gets the total voltage.

• Parallel circuits have less resistance.

What happens to the power in a parallel circuit if the total voltage increases?

• Power becomes zero

• Power decreases

• Power remains the same

• Power increases