Series, parallel, power

The two ends of a 3.0-Wresistor are connected to a 9.0-V battery. What is the current through the resistor?

• 27 A

• 6.3 A

• 3.0 A

• 0.33 A

The two ends of a 3.0-Wresistor are connected to a 9.0-V battery. What is the total power delivered by the battery to the circuit?

• 3.0 W

• 27 W

• 0.33 W

• 0.11 W

Three 8.0-ohms resistors are connected in series. What is their equivalent resistance?

• 24.0 ohms

• 8.0 ohms

• 0.38 ohms

• 0.13 ohms

Three resistors connected in series each carry currents labeled I₁,I₂and I₃. Which of the following expresses the value of the total current I_Tin the system made up of the three resistors in series?

• I_T= I₁+ I₂+ I₃

• I_T= (1/I₁+ 1/I₂ + 1/I₃)

• I_T= I₁= I₂= I₃

• I_T= (1/I₁+ 1/I₂ + 1/I₃)^-1

Three resistors connected in series have individual voltages labeled V₁, V₂and V₃, respectively. Which of the following expresses the value of the total voltage DV_Ttaken over the three resistors together?

• V_T= V₁ + V₂+ V₃

• V_T= (1/V₁+ 1/V₂+ 1/V₃)

• V_T= V₁= V₂ = V₃

• V_T= (1/V₁+ 1/V₂+ 1/V₃)^-1

Three resistors with values of R₁, R₂and R₃, respectively, are connected in series. Which of the following expresses the total resistance, R_T, of the three resistors?

• R_T= R₁+ R₂+ R₃

• R_T= (1/R₁+ 1/R₂+ 1/R₃)

• R_T= R₁= R₂= R₃

• R_T= (1/R₁+ 1/R₂ + 1/R₃)^-1

Three resistors, with values of 2.0, 4.0 and 8.0 ohms, respectively, are connected in series. What is the overall resistance of this combination?

• 0.58 ohms

• 1.1 ohms

• 7.0 ohms

• 14.0 ohms

Which resistor is in series with resistor R?

• R1

• R2

• R3

• R4

Three resistors, each with resistance R₁, are in series in a circuit. They are replaced by one equivalent resistor, R. Comparing this resistor to the first resistor of the initial circuit, which of the following is true?

• The current through R equals the current through R₁.

• The voltage across R equals the voltage across R1.

• The power given off by R equals the power given off by R1.

• R is less than R₁.

If R₁ < R₂< R₃,and if these resistors are connected in series in a circuit, which one dissipates the greatest power?

• R1

• R2

• R3

• all are equal