1 About Science 2 Mechanical Equilibrium 3 Newton's First Law Of Motion-interia 4 Linear Motion 5 Projectile Motion 6 Newton's Second Law Of Motion-force And Acceleration 7 Newton's Third Law Of Motion- Action And Reaction 8 Momentum 9 Energy 10 Circular Motion 11 Rotational Equilibrium 12 Rotational Motion 13 Universal Gravitation 14 Satellite Motion 15 Special Relativity-space And Time 16 Relativity-momentum, Mass, Energy, And Gravity 17 The Atomic Nature Of Matter 18 Solids 19 Liquids 20 Gases 21 Temerpature Heat, And Expansion 22 Heat Tranfer 23 Change Of Phase 24 Thermodynamics 25 Vibrations And Waves 26 Sound 27 Light 28 Color 29 Reflection And Refraction 30 Lenses 31 Diffractioon And Interference 32 Electrostatics 33 Electric Fileds And Potential 34 Electric Current 35 Electric Circuits 36 Magnetism 37 Electromagnetic Induction 38 The Atom And The Quantum 39 The Atomic Nucleus And Radioactivity 40 Nuclear Fission And Fusion expand_more
Chapter Questions expand_more
Problem 1A: What did Michael Faraday and Joseph Henry discover? Problem 2A: How can voltage be induced in a wire with the help of a magnet? Problem 3A: A magnet moved into a coil of wire will induce voltage in the coil. What is the effect of moving a... Problem 4A: Why is it more difficult to move a magnet into a coil of more loops that is connected to a resistor? Problem 5A: Current, as well as voltage, can be induced in a wire by electromagnetic induction. When can voltage... Problem 6A: How does the frequency of a changing magnetic field compare with the frequency of the alternating... Problem 7A: What is a generator, and how does it differ from a motor? Problem 8A: Why is the voltage induced in an alternator AC rather than DC? Problem 9A: The armature of a generator must rotate in order to induce voltage and current. What produces the... Problem 10A: A motor is characterized by three main ingredients: magnetic field, moving charges, and magnetic... Problem 11A: What does a transformer actually transform—voltage, current, or energy? Problem 12A: What does a step-up transformer step up—voltage, current, or energy? Problem 13A: How does the relative number of turns on the primary and the secondary coil in a transformer affect... Problem 14A: If the number of secondary turns is 10 times the number of primary turns, and the input voltage to... Problem 15A Problem 16A: Why is it advantageous to transmit electric power long distances at high voltages? Problem 17A: What fundamental quantity underlies the concepts of voltages and currents? Problem 18A: Distinguish between Faradays law expressed in terms of fields and Maxwells counterpart to Faradays... Problem 19A: How do the wave speeds compare for high-frequency and low-frequency electromagnetic waves? Problem 20A Problem 21A: The magnets are moved into the wire coils in identical quick fashion. Voltage induced in each coil... Problem 22A: The transformers are all powered with 100 W, and all have 100 turns on the primary. The number of... Problem 23A: When Tim pushes the wire down between the poles of the magnet, the galvanometer registers a pulse.... Problem 24A: A common pickup for an electric guitar consists of a coil of wire around a permanent magnet. The... Problem 25A: Two separate but similar coils of wire are mounted close to each other, as shown below. The first... Problem 26A: If you place a metal ring in a region in where a magnetic field is rapidly alternating, the ring may... Problem 27A: A magician places an aluminum ring on a table, underneath which is hidden an electromagnet. When the... Problem 28A: How could you light a lightbulb that is near, yet not touching, an electromagnet? Is AC or DC... Problem 29A: What is the basic difference between an electric generator and an electric motor? Problem 30A: With no magnets around, why will current flow in a coil of wire waved around in the air? Problem 31A: What is the source of all electromagnetic waves? Problem 32A: Why is a generator armature more difficult to rotate when it is connected to and supplying electric... Problem 33A: Your classmate says that, if you crank the shaft of a conventional motor manually, the motor becomes... Problem 34A: Some bicycles have electric generators that are made to turn when the bike wheel turns. These... Problem 35A: An electric hair drier running at normal speed draws a relatively small current. But if somehow the... Problem 36A: When a piece of plastic tape coated with iron oxide that is magnetized more in some parts than... Problem 37A: Why is it important that the core of a transformer pass through both coils? Problem 38A: Why can a hum often be heard when a transformer is operating? Problem 39A: When a strip of magnetic material, variably magnetized, is embedded in a plastic card that is moved... Problem 40A: If a car made of iron and steel moves over a wide closed loop of wire embedded in a road surface,... Problem 41A Problem 42A: How could you move a conducting loop of wire through a magnetic field without inducing a voltage in... Problem 43A: Why does a transformer require alternating voltage? Problem 44A: How does the current in the secondary of a transformer compare with the current in the primary when... Problem 45A: In what sense can a transformer be thought of as an electrical lever? What does it multiply? What... Problem 46A: Can an efficient transformer step up energy? Defend your answer. Problem 47A: A friend says that changing electric and magnetic fields generate one another, and this gives rise... Problem 48A: Would electromagnetic waves exist if changing magnetic fields could produce electric fields but... Problem 49A: When a bar magnet is dropped through a vertical length of copper pipe, it falls noticeably more... Problem 50A: What is wrong with this scheme? To generate electricity without fuel, arrange a motor to run a... Problem 51A: An electromagnet A with a coil of 10 turns carrying I A interacts with electromagnet B, which has... Problem 52A: An electric doorbell requires 12 volts to operate correctly. A transformer nicely allows it to be... Problem 53A: A model electric train requires 6 V to operate. When connected to a 120-V house-hold circuit, a... Problem 54A: If the output current for the above transformer is 1.8 amps, show that the input current is 0.09 A. Problem 55A: A transformer has an input of 9 volts and an output of 36 volts. If the input is changed to 12... Problem 56A: A model electric train requires a low voltage to operate. If the primary coil of its transformer has... Problem 57A Problem 58A Problem 59A: Neon signs require about 12,000 V for their operation. What should be the ratio of the number of... format_list_bulleted