1.		Thrust a magnet into a coil of wire and the coil
		becomes an electromagnet.
		has a current in it.
		both of these.
		neither of these

2.		When a magnet is thrust into a coil of wire, the coil tends to
		attract the magnet as it enters.
		repel the magnet as it enters.
		both of these.
		neither of these

3.		Electromagnetic induction occurs in a coil when there is a change in
		electric field intensity in the coil.
		magnetic field intensity in the coil.
		voltage in the coil.
		the coil's polarity.
		electromagnetic polarity

4.		Voltage can be induced in a wire loop by
		moving the wire near a magnet.
		moving a magnet near the wire.
		changing the current in a nearby wire.
		all of these.
		none of these

5.		As a motor armature turns faster and faster, net current in the motor windings
		increases.
		decreases.
		remains unchanged

6.		The magnetic field strength inside a current-carrying coil will be greater if the coil encloses a
		vacuum.
		wooden rod.
		glass rod.
		rod of iron.
		none of these

7.		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,
		one half as much voltage is induced.
		the same voltage is induced.
		twice as much voltage is induced.
		four times as much voltage is induced.
		none of these

8.		An electric motor and electric generator are
		very similar devices.
		entirely different devices

9.		A device that transforms electrical energy to mechanical energy is a
		generator.
		motor.
		transformer.
		magnet.
		none of these

10.		A device that transforms mechanical energy into electrical energy is a
		generator.
		motor.
		transformer.
		magnet.
		none of these

11.		If the voltage produced by a generator alternates, it does so because
		unlike a battery, it produces alternating current.
		the changing magnetic field that produces it alternates.
		alterations in the mechanical energy input.
		in effect it is an ac motor in reverse.
		the current it produces alternates

12.		A transformer actually transforms
		voltage.
		magnetic field lines.
		generators into motors.
		non-safe forms of energy to safe forms of energy.
		all of these

13.		The primary of a transformer is the coil connected to
		the load.
		the Internet.
		the power line.
		none of these

14.		Transformers use ac so there will be the required
		transfer of energy from coil to coil.
		voltage for transformation.
		change in magnetic field for operation.
		change in input current.
		magnetic field intensities

15.		Compared to the primary voltage, the secondary voltage may be
		larger.
		smaller.
		the same.
		the same or smaller, but not larger.
		larger, smaller, or the same

16.		Disconnect a small-voltage battery from a coil of many loops of wire and a large voltage is produced by
		the large collapse in the magnetic field.
		latent energy in the battery.
		the resistance of the battery to a change in polarity.
		electrons already in the wire.
		the electric field between the battery terminals

17.		Electric power can be transmitted from one place to another without the need for connecting wires in between. This statement is
		true.
		false

18.		Rapid change of a magnetic field induces
		a magnetic field of greater magnitude.
		a magnetic field of the same magnitude.
		an electric field

19.		The metal detectors that people walk through at airports operate via
		Ohm's law.
		Faraday's law.
		Coulomb's law.
		Newton's laws.
		civil laws

20.		A step-up transformer increases
		power.
		energy.
		both of these.
		neither of these

21.		The principal advantage of ac power over dc power is that
		less energy is dissipated during transmission.
		ac voltage oscillates while dc voltage does not.
		ac voltage can be transformed via conventional transformers.
		ac circuits multiply power more easily.
		ac circuits are safer

22.		Neon signs require about 12,000 volts to operate. If the circuit uses a 120-volt power source, the ratio of primary to secondary turns on the transformer should be
		1:100.
		100:1.
		neither of these

23.		Disregarding the effects of friction, a cyclist will coast farther when a lamp powered by a wheel generator is
		of low wattage.
		of high wattage.
		burned out.
		none of these