Power, Energy, and Resistors Quiz

What is the relationship between power (P), current (I), and resistance (R) in a resistor?

• P = I²R
• P = IR
• P = IV
• P = V/R

Which of the following formulas correctly represents power in terms of voltage (V) and current (I)?

• P = IV
• P = V²/R
• P = I²R
• P = V/I

If the current through a resistor is increased by a factor of 3, how does the power dissipated change?

• It triples
• It doubles
• It increases by a factor of 9
• It remains the same

In the equation P = V²/R, if the voltage is doubled and resistance is halved, how does power change?

• It increases by a factor of 4
• It decreases by a factor of 2
• It remains the same
• It increases by a factor of 2

What happens to the total resistance when resistors are connected in parallel?

• It increases
• It decreases
• It stays the same
• It depends on the individual resistances

If R1 = 4Ω and R2 = 6Ω are connected in series, what is the total resistance?

• 10Ω
• 2Ω
• 24Ω
• 12Ω

Which statement about series circuits is true?

• Current is the same through all components
• Voltage is the same across all components
• Total resistance is less than the smallest resistor
• Power is equally distributed among resistors

If two resistors of 5Ω and 10Ω are connected in parallel, what is the total resistance?

• 3.33Ω
• 15Ω
• 5Ω
• 20Ω

How does the total power in a circuit change if the voltage is increased while keeping resistance constant?

• It decreases
• It increases
• It remains the same
• It becomes zero

In a circuit with a voltage of 12V and a resistance of 4Ω, what is the power dissipated?

• 36W
• 48W
• 12W
• 3W