Circle the best answer for each of the following questions.

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1		When the rubber rod is stroked against the piece of fur
			A)	electrons are transferred from the fur to the rubber rod
			B)	electrons are transferred from the rubber rod to the fur
			C)	the fur becomes negatively charged
			D)	the rubber rod becomes magnetized
2		When the plastic ball is touched by the rubber rod
			A)	some of the charge is transferred from the rubber rod to the plastic ball
			B)	charge flows from the plastic ball to the rubber rod
			C)	the charge in the rubber rod is neutralized
			D)	no charge is transferred between the rubber rod and plastic ball
3		The plastic ball flies away from the rubber rod because
			A)	its electric field has been neutralized
			B)	it has acquired an electric charge opposite that of the rubber rod
			C)	some of the charge flows from the rod to the plastic ball and like charges repel
			D)	the rod’s magnetic field pushes the plastic ball away
4		The elementary particle that has no electric charge is the
			A)	proton
			B)	electron
			C)	atomic nucleus
			D)	neutron
5		The ampere is the unit of
			A)	resistance
			B)	electric current
			C)	potential difference
			D)	charge
6		If you divide voltage by resistance, the answer will be in units of
			A)	coulombs
			B)	ohms
			C)	amperes
			D)	watts
7		Ohm’s law holds only for
			A)	metallic conductors
			B)	gaseous conductors
			C)	liquid conductors
			D)	transistors
8		The unit of electric power is the
			A)	volt
			B)	ohm
			C)	ampere
			D)	watt

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9		Drawing A is the symbol for a
			A)	magnet
			B)	battery
			C)	compass
			D)	transformer
10		Drawing B is the symbol for
			A)	electric power
			B)	resistance
			C)	wattage
			D)	voltage
11		In Drawing C, the voltage is
			A)	1.5 V
			B)	0.75 V
			C)	12 V
			D)	7 V

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12		The filings have aligned themselves in the direction of the
			A)	electric current
			B)	electron flow
			C)	separation of charge
			D)	magnetic field
13		In the drawing, the poles for magnets B and C are unlabeled. Beginning with magnet B, the correct order for the missing poles is
			A)	N, S, S, N
			B)	S, N, N, S
			C)	S, N, S, N
			D)	N, S, N, S
14		Oersted’s experiment demonstrated that
			A)	a compass needle points toward the earth’s north magnetic pole
			B)	a magnetic field surrounds every electric current
			C)	field lines surround every magnet
			D)	an electric charge at rest has magnetic properties
15		A ____ circuit results when the connecting wires of an electric circuit accidently touch each other or are joined by a stray conductor.
			A)	live
			B)	random
			C)	short
			D)	hot