The Physical Universe
15th Edition
ISBN: 9780073513928
Author: Konrad Krauskopf, Arthur Beiser
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 6, Problem 28MC
A generator is said to “generate electricity.” What it actually does is act as a source of
- a. electric charge
- b. electrons
- c. magnetism
- d. electric energy
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Check out a sample textbook solutionChapter 6 Solutions
The Physical Universe
Ch. 6 - The charge on an electron a. is 1 C b. depends on...Ch. 6 - A positive electric charge a. attracts other...Ch. 6 - A positively charged rod is brought near an...Ch. 6 - Protons and electrons have different masses. When...Ch. 6 - Coulombs law for the force between electric...Ch. 6 - The electric force between a proton and an...Ch. 6 - An atom consists of a a. uniform distribution of...Ch. 6 - Prob. 8MCCh. 6 - An object has a positive electric charge whenever...Ch. 6 - A solid conductor is one a. whose electrons are...
Ch. 6 - Prob. 11MCCh. 6 - Match each of the electrical qualities listed...Ch. 6 - Electric power is equal to a. (current)(voltage)...Ch. 6 - The electric energy lost when a current passes...Ch. 6 - When a magnetized bar of iron is strongly heated,...Ch. 6 - All magnetic fields originate in a. iron atoms b....Ch. 6 - The force on an electron that moves in a curved...Ch. 6 - Magnetic field lines provide a convenient way to...Ch. 6 - In a drawing of magnetic field lines, the weaker...Ch. 6 - Prob. 20MCCh. 6 - Prob. 21MCCh. 6 - Prob. 22MCCh. 6 - Prob. 23MCCh. 6 - Prob. 24MCCh. 6 - Prob. 25MCCh. 6 - Prob. 26MCCh. 6 - Prob. 27MCCh. 6 - A generator is said to generate electricity. What...Ch. 6 - Prob. 29MCCh. 6 - Prob. 30MCCh. 6 - If 105 electrons are added to a neutral object,...Ch. 6 - A positive and a negative charge are initially 4...Ch. 6 - The force between two charges of 3 109 C that are...Ch. 6 - Five joules of work are needed to shift 10 C of...Ch. 6 - When the voltage across a certain resistance is V,...Ch. 6 - The voltage needed to produce a current of 5 A in...Ch. 6 - The resistance of a lightbulb that draws a current...Ch. 6 - The current in a 40-W, 120-V electric lightbulb is...Ch. 6 - A cars storage battery is being charged at a rate...Ch. 6 - A 120-V, 1-kW electric heater is mistakenly...Ch. 6 - A 240-V, 1-kW electric heater is mistakenly...Ch. 6 - Prob. 42MCCh. 6 - What reasons might there be for the universal...Ch. 6 - Electricity was once thought to be a weightless...Ch. 6 - A plastic ball has a charge of +1012 C. (a) Does...Ch. 6 - Why does the production of electricity by friction...Ch. 6 - Prob. 5ECh. 6 - Compare the basic characters of electric and...Ch. 6 - Find the total charge of 1 g of protons.Ch. 6 - Is there any distance at which the gravitational...Ch. 6 - When two objects attract each other electrically,...Ch. 6 - How do we know that the force holding the earth in...Ch. 6 - A hydrogen molecule consists of two hydrogen atoms...Ch. 6 - A charge of +2 107 C is 10 cm from a charge of 6 ...Ch. 6 - A charge of +3 109 C is 50 cm from a charge of 5 ...Ch. 6 - Two charges repel each other with a force of 0.1 N...Ch. 6 - Two charges originally 80 mm apart are brought...Ch. 6 - Two small spheres are given identical positive...Ch. 6 - (a) A metal sphere with a charge of +1 105 C is...Ch. 6 - Suppose the force between the earth and the moon...Ch. 6 - How far apart are two charges of +1 108 C that...Ch. 6 - How is the movement of electricity through air...Ch. 6 - One terminal of a battery is connected to a...Ch. 6 - Why do you think bending a wire does not affect...Ch. 6 - What basic aspect of superconductivity has...Ch. 6 - Sensitive instruments can detect the passage of as...Ch. 6 - (a) The capacity of a battery is usually quoted in...Ch. 6 - The energy stored in a certain 12-V battery is 3...Ch. 6 - The potential difference between a cloud and the...Ch. 6 - (a) A person can be electrocuted while taking a...Ch. 6 - How much current is drawn by a 240-V water heater...Ch. 6 - Prob. 30ECh. 6 - Prob. 31ECh. 6 - A fuse prevents more than a certain amount of...Ch. 6 - Should a fuse be connected in series or in...Ch. 6 - Heavy users of electric power, such as large...Ch. 6 - How are the terminals of a set of batteries...Ch. 6 - Prob. 36ECh. 6 - (a) If a 75-W lightbulb is connected to a 120-V...Ch. 6 - Prob. 38ECh. 6 - Prob. 39ECh. 6 - Prob. 40ECh. 6 - Prob. 41ECh. 6 - Prob. 42ECh. 6 - Prob. 43ECh. 6 - Prob. 44ECh. 6 - A 1.35-V mercury cell with a capacity of 1.5 A h...Ch. 6 - Prob. 46ECh. 6 - Prob. 47ECh. 6 - Prob. 48ECh. 6 - Prob. 49ECh. 6 - A current flows west through a power line. Find...Ch. 6 - Prob. 51ECh. 6 - Prob. 52ECh. 6 - Two parallel wires carry currents in the same...Ch. 6 - Prob. 54ECh. 6 - A current-carrying wire is in a magnetic field....Ch. 6 - Prob. 56ECh. 6 - Prob. 57ECh. 6 - Prob. 58ECh. 6 - Prob. 59ECh. 6 - Prob. 60ECh. 6 - Prob. 61ECh. 6 - Prob. 62ECh. 6 - Prob. 63ECh. 6 - Given a coil of wire and a small lightbulb, how...Ch. 6 - Prob. 65ECh. 6 - Prob. 66ECh. 6 - A transformer rated at a maximum power of 10 kW is...Ch. 6 - An electric welding machine uses a current of 400...
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- What creates a magnetic Hold? More than one answer may be correct, (a) a stationary object with electric charge (b) a moving object with electric charge (c) a stationary conductor carrying electric current (d) a difference in electric potential (e) a charged capacitor disconnected from a battery and at rest Note: In Chapter 34, we will see that a changing electric field also creates a magnetic field.arrow_forwardThe quantity B ds in Amperes law is called magnetic circulation. Figures 30.10 and 30.13 slum paths around which the magnetic circulation is evaluated. Each of these paths encloses an area. What is the magnetic flux through each area? Explain your answer.arrow_forwardA cyclometer is a device mounted on a bicycle that records and displays trip information such as elapsed time, distance traveled, and average speed. Modern versions employ small magnets attached to a spoke on either the front or rear wheel and a sensor located on the front fork or rear frame. As the magnet is carried past the detector once each wheel revolution, it produces an electrical pulse that is recorded and logged by an integrated circuit in the device. The distance traveled equals the total number of revolutions multiplied by the circumference of the wheel. (a) A typical mountain bike has a wheel diameter of 26 in. How far will a cyclist have traveled in both miles and kilometers if her cyclometer indicates that her front wheel has made 25,000 revolutions during her trip? (b) If the cyclometer clock shows that the elapsed time for the trip was 2 hours and 40 minutes, what was the rider’s average speed during this period?arrow_forward
- A magneto is used to cause the spark in a spark plug in many lawn mowers today. A magneto consists of a permanent magnet mounted on a flywheel so that it spins past a fixed coil. Explain how this arrangement generates a large enough potential difference to cause the spark.arrow_forwardIn Section 7.7, we defined conservative and nonconservative forces. In Chapter 23, we stated that an electric charge creates an electric field that produces a conservative force. Argue now that induction creates an electric field that produces a nonconservative force.arrow_forwardWhy do iron filings show magnetic field patterns?arrow_forward
- Discuss the similarities between the energy stored in the electric field of a charged capacitor and the energy stored in the magnetic field of a current-carrying coil.arrow_forwardAn electron moves through a uniform electric field E=(2.50i+5.00j)V/m and a uniform magnetic field B=0.400kT. Determine the acceleration of the electron when it has a velocity v=10.0im/s.arrow_forwardA magnet attracts a piece of iron. The iron can then attract another piece of iron. On the basis of domain alignment, explain what happens in each piece of Iron.arrow_forward
- What type of energy conversion does a generator perform? (8.5) (a) chemical energy into mechanical energy (b) mechanical energy into electrical energy (c) electrical energy into mechanical energy (d) mechanical energy into chemical energyarrow_forward(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) Describe the three basic interactions between electricity and magnetism.arrow_forward
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