Part AA 100-W, 120-V lightbulb has a resistance of 12 N when cold (20 °C) and150 N when on (hot).Calculate its power consumption at the instant it is turned on.Express your answer using two significant figures.nνα ΑΣφP ={\rm W}|SubmitRequest AnswerPart BCalculate its power consumption after a few moments when it is hot.Express your answer using two significant figures.?P =SubmitRequest Answer< Return to AssignmentProvide Feedback

V = 120 volts P = 100 W Resistance of lightbulb when cold (R) = 12 ohm Resistance of lightbulb when…

Part A A 100-W, 120-V lightbulb has a resistance of 12 SN when cold (20 °C) and 150 N when on (hot). Calculate its power consumption at the instant it is turned on. Express your answer using two significant figures. ? P= (\rm W} Submit Reguest Answer Part B Calculate its power consumption after a few moments when it is hot. Express your answer using two significant figures. P = W Submit Request Answer

Part A A 100-W, 120-V lightbulb has a resistance of 12 SN when cold (20 °C) and 150 N when on (hot). Calculate its power consumption at the instant it is turned on. Express your answer using two significant figures. ? P= (\rm W} Submit Reguest Answer Part B Calculate its power consumption after a few moments when it is hot. Express your answer using two significant figures. P = W Submit Request Answer

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A flash unit for a camera has a capacitance of 1800 uF . Part A What resistance is needed in this RC circuit if the flash is to charge to 90% of its full charge in 22 s? Express your answer using two significant figures. [ΨΕΙ ΑΣΦ R = Submit Previous Answers Request Answer ? ΚΩ
Two batteries with emf ℰ = 10 V and internal resistance r = 4 Ω and a resistor with R0 = 45 Ω are connected in series as shown in the figure. a. Express the total resistance, R, in terms of r and R0. b. Express the current, I, in terms of the emf, ℰ, and the total resistance, R. c. Express the voltage, ΔV, across the resister in terms of I and R0. d. Calculate the value of ΔV in volts.
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 ? ?
Your car's 31.8-W headlight and 2.50-kW starter are ordinarily connected in parallel in a 12.0-V system. What power would one headlight and the starter consume if connected in series to a 12.0-V battery? (Neglect any other resistor in the circuit and any change in resistance in the two devices. Give your answer to at least one decimal place.) W
A physics student has a single-occupancy dorm room. The student has a small refrigerator that runs with a current 4 A, a lamp that contains a 100-W bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 8 w. All the appliances run on a voltage of 110 V. Overall Hint a. What is the total power used by the dorm room (while the refrigerator runs)? Total power used by the dorm room is W. b. Assuming that the power plant for the electricity is 10 km away and uses 00-gauge copper wire (diameter 9.266 mm), how much power is dissipated in transmission (remember to count the return wire), if the power plant is directly providing the 110-V? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the dorm room is 110 V.) Hint for part (b) Power of W is dissipated in transmission at 110 V. c. The most common way to increase the efficiency of power transmission is by using higher voltage for long-distance transmission…
Consider the following circuit diagram. The potential difference across the battery is 40.0 volts, and it supplies a current of 5.00 amperes to the circuit. There is a current of of 2.70 amperes flowing through R1. Resistor R2 has a resistance of 5.50 ohms. What is the resistance of R3? Answer in ohms to two decimal places, but do not include units in your answer.
Calculate the power delivered to each resistor in the circuit shown in Figure P18.14. R, = 5.00 2, R2 = 3.00 2, and V = 18.0 V. 400 Figure P18.14 resistor R1 17.04 resistor labeled 4.00 2 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. W resistor R2 Your response differs from the correct answer by more than 100%. W resistor labeled 1.00 2 Enter a number. differs from the correct answer by more than 100%. W Submit Answer
A battery has emf 26.0 V and internal resistance r. A 9.00 N resistor is connected to the terminals of the battery, and the voltage drop across the resistor is 24.0 V Part A What is the internal resistance of the battery? Express your answer with the appropriate units. HA ? Value Units Submit Request Answer
Item 12 Two resistors are connected in series to a battery with an emf of 12 V. The voltage across the first resistor is 2.9 V and the current through the second resistor is 0.15 A. Part A Find the resistance of the first resistor. Express your answer using two significant figures. R₁ = Submit Part B VE ΑΣΦ Find the resistance of the second resistor. R₂ = Request Answer Express your answer using two significant figures. Submit V ΑΣΦ Request Answer ? ? Ω 22
Each of the five resistors has resistance R, and each of the five capacitors has capacitance C. The internal resistance of the battery is negligible. What is the time constant of the circuit shown in figure? R R R TC A. 5 RC B. RC C. 10 RC D. 25 RC
A circuit consists of a battery connected to three resistors (70 N, 30 N, and 170 2 ) in parallel. The total current through the resistors is 2.9 A Part A Find the emf of the battery. Express your answer using two significant figures. Πν ΑΣφ E = V Submit Request Answer Part B Find the current through 70 N resistor. Express your answer using two significant figures. ? I = A
The tungsten filament of a light bulb uses 60 W when connected to a 120 V power line. When the bulb is cold, its resistance is 24 Ω. a. What is the resistance of the bulb when it is hot? b. What current flows through the bulb when it is cold? c. What current flows through the bulb when it is hot?