Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 13, Problem 24CQ
If the current through a certain resistance is doubled, does the power dissipated in that resistor also double? Explain.
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Physics of Everyday Phenomena
Ch. 13 - Two arrangements of a battery, bulb, and wire are...Ch. 13 - Suppose you have two wires, a battery, and a bulb....Ch. 13 - In a simple battery-and-bulb circuit, is the...Ch. 13 - Are electric current and electric charge the same...Ch. 13 - When an axon is stimulated, a voltage spike or...Ch. 13 - Does the signal in an axon travel at the same...Ch. 13 - Consider the circuit shown, where the wires are...Ch. 13 - Consider the circuit shown. Could we increase the...Ch. 13 - Two circuit diagrams are shown. Which one, if...Ch. 13 - Suppose we use an uncoated metal clamp to hold the...
Ch. 13 - Consider the two signs shown, which are located in...Ch. 13 - If we decrease the potential difference across a...Ch. 13 - Prob. 13CQCh. 13 - When a battery is being used in a circuit, will...Ch. 13 - Two resistors are connected in series with a...Ch. 13 - In the circuit shown below. R1, R2,. and R3 are...Ch. 13 - In the circuit shown in question 16, which of the...Ch. 13 - If we disconnect R2, from the rest of the circuit...Ch. 13 - When current passes through a series combination...Ch. 13 - In the circuit shown, the circle with a V in it...Ch. 13 - In the circuit shown, the circle with an A in it...Ch. 13 - Which will normally have the larger resistance, a...Ch. 13 - Is electric energy the same as electric power?...Ch. 13 - If the current through a certain resistance is...Ch. 13 - Prob. 25CQCh. 13 - What energy source increases the potential energy...Ch. 13 - Prob. 27CQCh. 13 - Prob. 28CQCh. 13 - Prob. 29CQCh. 13 - Prob. 30CQCh. 13 - Prob. 31CQCh. 13 - Prob. 32CQCh. 13 - Why does a bimetallic strip bend when the...Ch. 13 - A charge of 28 C passes at a steady rate through a...Ch. 13 - A current of 4.5 A flows through a battery for 3...Ch. 13 - Prob. 3ECh. 13 - A current of 1.5 A is flowing through a resistance...Ch. 13 - A current of 0.522 A flows through a resistor with...Ch. 13 - Four 22 resistors are connected in series to an...Ch. 13 - A 47 resistor and a 28 resistor are connected in...Ch. 13 - In the circuit shown, the 1 resistance is the...Ch. 13 - Three resistors are connected to a 12-V battery as...Ch. 13 - Two resistors, each having a resistance of 40 ....Ch. 13 - Prob. 11ECh. 13 - Three identical resistances, each 30 , are...Ch. 13 - A 9-V battery in a simple circuit produces a...Ch. 13 - A 80 resistor has a voltage difference of 12 V...Ch. 13 - A 75-W light bulb operates on an effective ac...Ch. 13 - A toaster draws a current of 9.0 A when it is...Ch. 13 - A clothes dryer uses 6600 W of power when...Ch. 13 - In the circuit shown, the internal resistance of...Ch. 13 - Three 36 lightbulbs are connected in parallel to...Ch. 13 - In the circuit shown, the 8-V battery is opposing...Ch. 13 - In the combination of 12 resistors shown in the...Ch. 13 - A 850-W toaster, a 1200-W waffle iron, and a...
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- When working with high-power electric circuits, it is advised that whenever possible, you work "one-handed” or “keep one hand in your pocket." Why is this a sensible suggestion?arrow_forwardA 2.00- and a 7.50-F capacitor can be connected in series or parallel, as can a 25.0- and a 100k resistor. Calculate the four RC time constants possible from connecting the resulting capacitance and resistance in series.arrow_forwardThe power dissipated in a resistor is given by P = V2/R, which means power decreases if resistance increases. Yet this power is also given by P = I2R, which means power increases if resistance increases. Explain why there is no contradiction here.arrow_forward
- Show that if two resistors R1and R2are combined and one is much greater than the other (R 1 >>R 2 ): (a) Their series resistance is very nearly equal to the greater resistance R 1. (b) Their parallel resistance is very nearly equal to smaller resistance R2.arrow_forwardRefer to Figure 10.17 and the discussion of lights dimming when a heavy appliance comes on. (a) Given the voltage source is 120 V, the wire resistance is 0.800 and the bulb is nominally 75.0 W, what power will the bulb dissipate if a total of 15.0 A passes through the wires when the motor comes on? Assume negligible change in bulb resistance, (b) What power is consumed by the motor?arrow_forwardIntegrated Concepts If you wish to take a picture of a bullet traveling at 500 m/s, then a very brief flash of light produced by an RC discharge through a flash tube can limit blurring. Assuming 1.00 mm of motion during one RC constant is acceptable, and given that the flash is driven by a 600F capacitor, what is the resistance in the flash tube?arrow_forward
- An electronic apparatus may have large capacitors at high voltage in the power supply section, presenting a shock hazard even when the apparatus is switched off. A “bleeder resistor" is therefore placed across such a capacitor, as shown schematically in Figure 21.50, to bleed the charge from it after the apparatus is off. Why must the bleeder resistance be much greater than the effective resistance of the rest of the circuit? How does this affect the time constant for discharging the capacitor?arrow_forwardFind the current through a person and identify the likely effect on her if she touches a 120-V AC source: (a) if she is standing on a rubber mat and offers a total resistance of 300 k; (b) if she is standing barefoot on wet grass and has a resistance of only 4000 k .arrow_forwardFoolishly trying to fish a burning piece of bread from a toaster with a metal butter knife, a man conies into contact with 120-V AC. He does not even feel it since, luckily, he is wearing rubber-soled shoes. What is the minimum resistance of the path the current follows through the person?arrow_forward
- Integrated Concepts A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of 10.0 A. (a) What is the battery’s internal resistance? (b) What power is dissipated inside the battery? (c) At what rate (in °C/min ) will its temperature increase if its mass is 20.0 kg and it has a specific heat of 0.300 kcal/kg. °C, assuming no heat escapes?arrow_forwardFigure 21.55 shows how a bleeder resistor is used to discharge a capacitor after an electronic device is shut off allowing a person to work on the electronics with less risk of shock, (a) What is the time constant? (b) How long will it take to reduce the voltage on the capacitor to 0.250% (5% of 5%) of its full value once discharge begins? (c) If the capacitor is charged to a voltage V0through a 100-O resistance, calculate the time it takes to rise to 0.865V0(This is about two time constants.)arrow_forwardIntegrated Concepts (a) An immersion heater utilizing 120 V can raise the temperature of a 1.00 102 -g aluminum cup containing 350 g of water from 20.0°C to 95.0°C in 2.00 min. Find its resistance, assuming it is constant during the process. (b) A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.arrow_forward
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