Pearson eText Conceptual Integrated Science -- Instant Access (Pearson+)

3rd Edition

ISBN: 9780135626573

Author: Paul Hewitt, Suzanne Lyons

Publisher: PEARSON+

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Textbook Question

Chapter 7, Problem 17RCQ

What is the effect on the current through a circuit of steady resistance when the voltage is doubled? What is the effect on the current if both voltage and resistance are doubled?

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Chapter 7, Problem 16RCQ

Chapter 7, Problem 18RCQ

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Chapter 7 Solutions

Pearson eText Conceptual Integrated Science -- Instant Access (Pearson+)

Ch. 7 - Which part of an atom is positively charged, and...Ch. 7 - What is meant by saying that charge is conserved?Ch. 7 - How is Coulombs law similar to Newtons law of...Ch. 7 - How does a coulomb of charge compare with the...Ch. 7 - Give two examples of common force fields.Ch. 7 - How is the direction of an electric field defined?Ch. 7 - In terms of the units that measure them,...Ch. 7 - A balloon may easily be charged to several...Ch. 7 - What is the difference between a conductor and an...Ch. 7 - What kinds of material are the best conductors?...

Ch. 7 - What condition is necessary for heat energy to...Ch. 7 - What condition is necessary for a sustained flow...Ch. 7 - Why do electrons, rather than protons, make up the...Ch. 7 - Distinguish between DC and AC.Ch. 7 - Which has more resistancea thick wire or a thin...Ch. 7 - What is the unit of electrical resistance?Ch. 7 - What is the effect on the current through a...Ch. 7 - How much current does a radio speaker with a...Ch. 7 - Which type of circuit is favored for operating...Ch. 7 - How does the sum of the currents through the...Ch. 7 - What is the relationship among electric power,...Ch. 7 - Considering a kilowatt and a kilowatt-hour, which...Ch. 7 - Prob. 23RCQ Ch. 7 - Prob. 24RCQ Ch. 7 - Prob. 25RCQ Ch. 7 - Why is iron magnetic and wood is not?Ch. 7 - Prob. 27RCQ Ch. 7 - What is a galvanometer? What is it called when it...Ch. 7 - What are the three ways in which voltage can be...Ch. 7 - a What is induced by the rapid alternation of a...Ch. 7 - High voltage by itself does not produce electric...Ch. 7 - What is the source of the electrons that shock you...Ch. 7 - If a current of 0.1 or 0.2 of an ampere were to...Ch. 7 - What effect does high temperature have on a common...Ch. 7 - Electric charges at rest produce an electric...Ch. 7 - People have wondered about the "mystery" of animal...Ch. 7 - What is the likely cause of Earths magnetic field?Ch. 7 - Two point charges, each with 0.1C of charge, are...Ch. 7 - A toaster has a heating element of 15 and is...Ch. 7 - When you touch your fingers resistance 1000 to the...Ch. 7 - Calculate the current in the 240 filament of a...Ch. 7 - An electric toy draws 0.5A from a 120-V outlet....Ch. 7 - Show that the power consumed by a 120-V device...Ch. 7 - The three pairs of same-size metal spheres have...Ch. 7 - Rank circuits A, B, and C according to the...Ch. 7 - The bulbs in parallel circuits A, B, and C are...Ch. 7 - Bar magnets are moved into the wire coils in...Ch. 7 - Two point charges are separated by 6cm. The...Ch. 7 - A droplet of ink in an industrial ink-jet printer...Ch. 7 - Find the voltage change a when an electric field...Ch. 7 - Rearrange this equation Current=voltageresistance...Ch. 7 - Use the formula Power=currentvoltage to find that...Ch. 7 - Show that it costs 3.36 to operate a 100-W lamp...Ch. 7 - An electric iron connected to 120V draws 9A of...Ch. 7 - When combing your hair, you scuff electrons from...Ch. 7 - The 5000 billion billion freely moving electrons...Ch. 7 - What is meant by saying that charge is conserved?Ch. 7 - Two equal charges exert equal forces on each...Ch. 7 - How does the strength of electric force between a...Ch. 7 - In what way does an electrically polarized object...Ch. 7 - A particle having a charge qcoulombs experiences a...Ch. 7 - Suppose that the strength of the electric field...Ch. 7 - What is the term given to the electric potential...Ch. 7 - Why might the wingspans of birds be a...Ch. 7 - Why is a good conductor of electricity also a good...Ch. 7 - A garden hose waters a garden. Water in a car...Ch. 7 - A hydraulic pump doesnt produce water but,...Ch. 7 - Lillian is charged to some 50,000V but is...Ch. 7 - Batteries and generators produce electric current....Ch. 7 - Which travels at nearly the speed of light in an...Ch. 7 - Which flows through an electric circuit: voltage,...Ch. 7 - Comment on the warning sign in the sketch.Ch. 7 - Which has the greater electric resistance: a wire...Ch. 7 - What is the effect on the current in a wire if the...Ch. 7 - Why can a bird safely perch on an un insulated...Ch. 7 - If a bird perched on a high-voltage wire reaches...Ch. 7 - Will the current in a light bulb connected to a...Ch. 7 - In Figure 7.24, Will uses four batteries to light...Ch. 7 - In Figure 7.25, author Paul lights three identical...Ch. 7 - As more and more bulbs are connected in a series...Ch. 7 - In the circuit shown, how does the brightness of...Ch. 7 - What unit of measurement is meant by a joule per...Ch. 7 - What happens to the brightness in a lamp of any...Ch. 7 - Why are LED bulbs more efficient than incandescent...Ch. 7 - Electric charge may be positive or negative but...Ch. 7 - Surrounding any mass is a gravitational field....Ch. 7 - In what sense is motion relevant to a magnetic...Ch. 7 - Since every iron atom is a tiny magnet, why aren't...Ch. 7 - In what relative direction between a magnetic...Ch. 7 - Prob. 97TE Ch. 7 - Is it correct to say that an electric motor is a...Ch. 7 - In what way did Maxwell add to the physics of...Ch. 7 - How does electromagnetic induction lead to the...Ch. 7 - When a car is moved into a painting chamber, a...Ch. 7 - You are not harmed by contact with a charged Van...Ch. 7 - Discuss the circuits shown. In which of these...Ch. 7 - Sometimes you hear someone say that a particular...Ch. 7 - Are automobile headlights wired in parallel or in...Ch. 7 - Your tutor tells you that an ampere and a volt...Ch. 7 - The circuit shown in an incandescent flashlight...Ch. 7 - A person in your discussion group says that...Ch. 7 - Another person in your discussion group says that...Ch. 7 - Still another person in your discussion group says...Ch. 7 - Can an electron at rest in a magnetic field be set...Ch. 7 - A magician places an aluminum ring on a table,...Ch. 7 - An electron and a proton a attract each other. b...Ch. 7 - When a pair of charged particles are brought twice...Ch. 7 - Surrounding every moving electron is a an electric...Ch. 7 - When you double the voltage in a simple electric...Ch. 7 - In a simple circuit consisting of a single lamp...Ch. 7 - In a circuit with two lamps in parallel if the...Ch. 7 - If both current and the voltage in a circuit are...Ch. 7 - The essential physics concept in an electric...Ch. 7 - Prob. 9RAT Ch. 7 - The mutual induction of electric and magnetic...

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