Chapter 26, Problem 049 A 120 W lightbulb is plugged into a standard 120 V outlet....
A 140 W lightbulb is plugged into a standard 12D V outlet. (a) How much does it cost in dollars per 31-day month to leave the light turned on continuously? Assume electrical energy costs US$ 0.07/kW middot h. (b) What is the resistance of the bulb? (c) What is the current in the bulb? (a) Number Units (b) Number Units (c) Number units
A 75.0 W light bulb is plugged into a 120 V outlet. What is the resistance of the bulb’s filament?
Light bulb A is marked "25 W 120 V" and light bulb B "100 W 120 V"; this means that each bulb converts its respective power when plugged into a constant 120 V source, Find the resistance of each bulb, How long does it take for 1.00 C to pass into bulb A? Is this charge different in any way upon its exit from the bulb versus it entry? Explain, How long does it take for 1.00 J to pass...
Lightbulb A is marked "40 W 120 V", and lightbulb B is marked "75 W 120 V". These labels mean that each lightbulb has its respective power delivered to it when it is connected to a constant 120-V source. (a) Find the resistance of each lightbulb. R(40 W 120 V) = Ω R(75 W 120 V) = Ω (b) During what time interval does 2.30 C pass into lightbulb A? Δt = s (d) In what time interval does 3.00...
A 15-W compact fluorescent light bulb is used in a lamp plugged into a 120-V wall socket. You can assume the lamp itself has zero resistance. Find (a) the resistance of the light bulb, (b) the maximum current through the bulb, and (c) the maximum power used by the light bulb. Also, if the frequency of the electricity is the typical household value of f = 60 Hz, what are the first two times that the current going through the...
A 1500-W heater is designed to be plugged into a 120-V outlet. What current will flow through the heating coil when the heater is plugged in? I = A What is R , the resistance of the heater? How long does it take to raise the temperature of the air in a good-sized living room 3.0m x 5.0m x 8m by 10 degrees C? Note that the specific heat of air is 1006 J/(kg x degrees C) and the density...
Lightbulb A is rated at 120 V and 100 W for household applications. Lightbulb B is rated at 12 V and 100 W for automotive applications. Part A What is the current through each bulb? Express your answer using two significant figures. Enter your answers numerically separated by a comma. IVO AXO ? IA, IB = A Submit Request Answer Submit Part B What is the resistance of each bulb? Express your answer using two significant figures. Enter your answers...
Lightbulb A is marked "10.0 W 120 v," and lightbulb B is marked 100 W 120 V." These labels mean that each lightbulb has its respective power delivered to it when it is connected to a constant 120-V source. (a) Find the resistance of each lightbulb. (b) During what time interval does 2.00 C pass into lightbulb A? (c) Is this charge different upon its exit versus its entry into the lightbulb? Yes O No Explain. This answer has not...
Two light bulbs both operate on 120 V. Which draws less current a 60-W lightbulb or a 75-W bulb? Which one has the lower resistance?
Chapter 26, Problem 041 A 120 V potential difference is applied to a space heater whose resistance is 15 Ω when hot. (a) At what rate is electrical energy transferred to thermal energy? (b) What is the cost for 5.5 h at US$0.05/kW·h?