PHYSICS F/SCI.+ENGR.,CHAPTERS 1-37
5th Edition
ISBN: 9780134378060
Author: GIANCOLI
Publisher: RENT PEARS
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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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If the resistance of a small immersion heater (to heat water
for tea or soup, Fig. 18–32) was increased, would it speed up
or slow down the heating process? Explain.
FIGURE 18–32
Question 8.
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'.
(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
Chapter 25 Solutions
PHYSICS F/SCI.+ENGR.,CHAPTERS 1-37
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 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(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
- (III) A small immersion heater can be used in a car to heat acup of water for coffee or tea. If the heater can heat 120 mLof water from 25°C to 95°C in 8.0 min, (a) approximatelyhow much current does it draw from the car’s 12-V battery,and (b) what is its resistance? Assume the manufacturer’sclaim of 85% efficiencyarrow_forwardA typical flash bulb is rated at 310 mA and 2.90 V, the respective values of current and voltage under operational conditions. If the resistance of the filament when it is cold (To-20°C) is 1.12 , calculate its temperature when the lamp is on. The filament is made of tungsten with a coefficient of expansion is a = 4.5 x 10-3⁰C-1arrow_forwardWhy is it advisable to allow electric line to sag between poles? Is it possible for a ship to use the internal energy of seawater to operate itsengine? Explain.arrow_forward
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