Question Set 13 - Dr. Bryan PDF

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An electric motor is very similar to An electric generator If a magnet is pushed into a coil, voltage is induced across the coil. If the same magnet is pushed into a coil at half the speed, One half as much voltage is induced. Which scientist discovered the process known as electromagnetic induction? Michael Faraday An iron nail is more strongly attracted to the North or south pole—no difference really If a magnet is pushed into a coil, voltage is induced across the coil. If the same magnet is pushed into a coil with twice the number of loops, Twice as much voltage is induced Which class of materials is very slightly repelled by very strong magnetics? Paramagnetic diamagnetic Magnetism is due to the motion of electrons as they Move around the nucleus and spin on their axes The reason a magnet will not pick up an unmagnetized plastic paper clip is that The magnet cannot temporarily magnetize the plastic paper clip DC motors are fairly simple and inexpensive to make. True Magnetic field lines about a current-carrying wire Circle the wire in closed loops Which class of materials is strongly attracted to magnets? Ferromagnetic Like kinds of magnetic poles repel while unlike kinds of magnetic poles Attract When the world one day runs out of oil, we will not be able to produce electricity anymore. False When a magnet is plunged in and out of a closed coil of wire, voltage is induced in the coil. If the rate of the in-and-out motion is tripled, the induced voltage is Tripled

Nail picking up pins is an example of How to make an electromagnet

The field(s) surrounding every moving proton is (are) Always both electric and magnetic. Which scientist is credited for inventing the first electric motor? Michael Faraday The source of all magnetism is Moving electric charge Nuclear power plants produce electricity because the nuclear reactions produce Tremendous amounts of heat Electromagnets can be made weaker by Both b and d The fields surrounding every stationary electron is Always electric and never magnetic

Electromagnets can be made stronger by Wrapping them with more turns of wire and increasing the current flow around them A device that transforms electrical energy to mechanical energy is a Motor The fields surrounding every moving neutron is Always both electric and magnetic The fields surrounding every moving electron are Always both electric and magnetic Several paper clips dangle in a chain from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a North pole When a magnet moves in and out of a close loop wire, the type of electricity that is generated is known as Alternating current Break a magnet in two and you

Always produce two magnets, each with north and south poles, no matter what the size of the original magnet Which of the following materials contain billions of electrons in motion that are surrounded by tiny magnetic fields? All four of these Which class of materials is very slightly attracted to very strong magnets? Paramagnetic If the north pole of a magnet is thrust into a closed loop of wire and produces a positive current, then when it is pulled back out of the loop the current will be Negative...