Power and Circuit Analysis Concepts

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

• P = I / V

• P = I * V

• P = V / I

• P = I^2 * R

In the example problem, what is the current flowing through the water?

• 1.5 amps

• 2.5 amps

• 3.5 amps

• 4.5 amps

How long does it take to heat the water to the desired temperature in the example problem?

• 20 minutes 15 seconds

• 18 minutes 36 seconds

• 15 minutes 45 seconds

• 22 minutes 10 seconds

Which law is used to derive alternative expressions for power?

• Ohm's Law

• Faraday's Law

• Coulomb's Law

• Newton's Law

What is the expression for power using Ohm's Law and resistance?

• P = I^2 / R

• P = V^2 / R

• P = V * I

• P = R^2 / V

In the problem-solving section, which resistor arrangement provides the maximum power?

• R over 3

• 3 times R

• 2 times R

• R plus R over 2

What happens to power when resistance increases, given a constant voltage?

• Power increases

• Power decreases

• Power remains the same

• Power doubles

In the further problem-solving section, what is the power ratio between circuit X and circuit Y?

• 1:2

• 2:1

• 4:1

• 1:4

What is the equivalent resistance in circuit Y?

• 3R

• R

• R/2

• 2R

Which circuit configuration uses more power by a factor of 4?

• Circuit X

• Circuit A

• Circuit Y

• Circuit B