Science Bowl Practice Questions

Physics - 14

w) increases
x) decreases
y) remains the same
z) decreases, then remains the same

ANSWER: W -- INCREASES

85.

Multiple Choice: Two vibrating particles that are "out of phase" differ in the phase of their vibration
by:

w) 1/4 cycle
x) 1/2 cycle
y) 3/4 cycle
z) 1 cycle

ANSWER: X -- 1/2 CYCLE

86.

Multiple Choice: The SI unit of pressure is the:

w) Torr
x) dyne per centimeter squared
y) atmosphere
z) pascal

ANSWER: Z – PASCAL

87.

Multiple Choice: An electroscope charged WITHOUT contacting a charged body is charged by:

w) induction
x) conduction
y) convection
z) insulation

ANSWER: W -- INDUCTION

88.

Multiple Choice: The potential drop between the terminals of a battery is equal to the battery's EMF
when:

w) no current is drawn from the battery
x) a very large current is drawn from the battery
y) the internal resistance of the battery is very large
z) the resistance in the external circuit is small

ANSWER: W -- NO CURRENT IS DRAWN FROM THE BATTERY

89.

Multiple Choice: To convert a galvanometer to a voltmeter, you should add a:

w) high resistance in series
x) high resistance in parallel
y) low resistance in series
z) low resistance in parallel

ANSWER: W -- HIGH RESISTANCE IN SERIES

90.

Multiple Choice: The greatest induced EMF will occur in a straight wire moving at constant speed
through a uniform magnetic field when the angle between the direction of the wire's motion and the
direction of the magnetic field is

w) 0 degrees
x) 30 degrees