EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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Textbook Question
Chapter 25, Problem 9Q
If the resistance of a small immersion heater (to heat water for tea or soup. Fig. 25–33) was increased, would it speed up or slow down the heating process? Explain.
FIGURE 25-33 Question 9.
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(ii) The following table shows the electrical appliances used by a person for every day.
No.
Electrical
No. of Appliances Time of use
Appliances
1.
Lamp (40W)
15
14 hours/day
Electric
2.
Heater(1600W)
Refrigerator
(200W)
2
5 hours/day
3.
1
24 hours/day
Calculate the electricity bill of the household for the month if the cost per unit of electric energy is 10 Bz/ kWh.
(1) Total energy(in kWh) consumed in the month =
kWh
(2) Electricity bill(in riyals) for the month =
riyals
ii)
The resistance of a filament of a bulb is 200 N when the bulb is lit up
and 12 2 when it is not lit. Calculate the temperature of the filament
when alight. The room temperature is 30° C and the temperature
coefficient of the filament is 4.5 x 103 °C'.
- If the heater wire is replaced by a wire with lower resistance, is the time required to heat the gas (a) unchanged,(b) increased, or (c) decreased?
Chapter 25 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
Ch. 25.2 - If 1 million electrons per second pass a point in...Ch. 25.2 - Prob. 1BECh. 25.3 - Return to the Chapter-Opening Question, page 651,...Ch. 25.4 - Prob. 1DECh. 25.4 - Prob. 1EECh. 25.4 - Prob. 1FECh. 25.4 - How many 60-W 120-V lightbulbs can operate on a...Ch. 25.6 - Each channel of a stereo receiver is capable of an...Ch. 25 - What quantity is measured by a battery rating...Ch. 25 - When an electric cell is connected to a circuit,...
Ch. 25 - When a flashlight is operated, what is being used...Ch. 25 - One terminal of a car battery is said to be...Ch. 25 - When you turn on a water faucet, the water usually...Ch. 25 - Can a copper wire and an aluminum wire of the same...Ch. 25 - The equation P = V2/R indicates that the power...Ch. 25 - What happens when a lightbulb burns out?Ch. 25 - If the resistance of a small immersion heater (to...Ch. 25 - Prob. 10QCh. 25 - Explain why lightbulbs almost always burn out just...Ch. 25 - Which draws more current, a 100-W lightbulb or a...Ch. 25 - Electric power is transferred over large distances...Ch. 25 - A 15-A fuse blows repeatedly. Why is it dangerous...Ch. 25 - When electric lights are operated on low-frequency...Ch. 25 - Driven by ac power, the same electrons pass back...Ch. 25 - The heating element in a toaster is made of...Ch. 25 - Is current used up in a resistor? Explain.Ch. 25 - Compare the drift velocities and electric currents...Ch. 25 - A voltage V is connected across a wire of length l...Ch. 25 - Why is it more dangerous to turn on an electric...Ch. 25 - Prob. 1PCh. 25 - Prob. 2PCh. 25 - Prob. 3PCh. 25 - Prob. 4PCh. 25 - Prob. 5PCh. 25 - Prob. 6PCh. 25 - Prob. 7PCh. 25 - Prob. 8PCh. 25 - Prob. 9PCh. 25 - Prob. 10PCh. 25 - Prob. 11PCh. 25 - Prob. 12PCh. 25 - Prob. 13PCh. 25 - Prob. 14PCh. 25 - Prob. 15PCh. 25 - (II) A rectangular solid made of carbon has sides...Ch. 25 - (III) A hollow cylindrical resistor with inner...Ch. 25 - Prob. 63GP
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- (II) How many kWh of energy does a 550-W toaster use inthe morning if it is in operation for a total of 5.0 min? At acost of 9.0 cents/ kWh estimate how much this would addto your monthly electric energy bill if you made toast fourmornings per week.arrow_forward(II) How much would you have to raise the temperature ofa copper wire (originally at 20°C) to increase its resistanceby 12%?arrow_forwardA toaster has a Nichrome (a=4.5×104 °C-) heating element that has a resistance of Ro= 80 2 at a temperature T=20 °C. When the toaster is turned on, the resistance of the element rises to 92.7 Q and its temperature is increased. Find the final temperature (in °C) of the heating element. A Moving to another question will save this response. «< Question 5 of 12 Close Windowarrow_forward
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