The cord from an appliance is too short to reach the wall outlet in your room. You have two extension cords to choose from. a) Find the voltage drop in the first extension cord having a 0.0780 Ω resistance and through which 7.60 A is flowing. b)The second extension cord is cheaper and utilizes thinner wire. It has a resistance of 0.780 Ω and the current flowing through it is 7.60 A. By what amount does the voltage supplied to the appliance change when the first extension cord is replaced by the second?

Three identical 100.0-W, 120-V lightbulbs are connected across a 120-V power source as shown in in the figure below. Assume that the resistance of each bulb is constant (even though in reality the resistance increases markedly with current). 120 V R₁ R₂ (a) Find the total power supplied by the power source. W = (b) Find the potential difference across each lightbulb. AV₁ AV₂ = AV₂ = Need Help? Read It R₂ V Master It

A capacitor that is initially uncharged is connected in series with a resistor and a 400.0 V emf source with negligible internal resistance. Just after the circuit is completed, the current through the resistor is 0.800 mA and the time constant for the circuit is 6.00 s. ▼ Part A What is the resistance of the resistor? Express your answer with the appropriate units. R = Submit Part B C = Value Submit What is the capacitance of the capacitor? Express your answer with the appropriate units. Request Answer 0 Value Units Request Answer Units ? ?

The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V open-circuit voltage, whereas an alkaline cell has a 1.58-V open-circuit voltage. The radio has a 3.2 0 resistance. Hint a. With a nicad cell, having an internal resistance of 0.04 02, what is the voltage supplied to the radio, if a single nicad cell is used? The voltage supplied to the radio is b. With an alkaline cell, having an internal resistance of 0.2 , what is the voltage supplied to the radio, if a single alkaline cell is used? The voltage supplied to the radio is The radio's effective resistance is lowered when its volume is turned up. At what value of radio's resistance does a nicad cell begin to supply a greater voltage to the radio than an alkaline cell? Hint for (c) When the radio has an effective resistance of voltage can be obtained with a nicad cell. V. V. 2 or smaller, a greater

Figure P18.19 shows a circuit diagram. (R1 = 1550 , R2 = 430 , ΔV = 20.5 V) (a) Determine the current. (b) Determine the potential of wire A relative to ground. (c) Determine the voltage drop across the 1550  resistor.

A current of 257 mA travels through a network of three resistors in parallel.  The resistors have values of 4.35 Ω, 4.37 Ω, & 6.58 Ω.  What is the voltage applied to the network?

60 Ω 4. A circuit is shown with the currents below. a) Find the current through the 60 Q resistor. Find the charge on the 2.0 µF capacitor. 10 Ω. 6.58A b) + 100 V 40 N 0.6SA 2.0 µF=

A series circuit has two resistors with values R1 = 3.00 Ω and R2 = 0.250 Ω. If the potential of the circuit is 5.00 V, what is the current through R1? Choose the correct answer from the options below 1.67 A 1.54 A 20.0 A 21.7 A