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1
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What is the equivalent resistance of the circuit?

A
18 Ω
B
1.6 Ω
C
0.61 Ω
D
7.5 Ω
2
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How does the circuit change when the wire is added?

A
A short circuit occurs and makes bulbs 3 and 4 turn off but keeps bulbs 1 and 2 lit.
B
A short circuit occurs and makes bulbs 1 and 2 turn off but keeps bulbs 3 and 4 lit.
C
An open circuit occurs and makes all bulbs turn off.
D
A closed circuit occurs and makes all bulbs turn off.
3

Which best illustrates how the carrier wave would likely appear after pulse modulation?

A
Image with description A radio wave going left to right. The waves are tightly close together and equal distance as well as equal distance above and below the middle line.
B
Image with description A radio wave going left to right. The lines are equal distance apart and equal distance from the middle line. Occasionally, a wave does not cross the middle line but instead arcs back making a double wave on one side of the line.
C
Image with description A radio wave going left to right. There are two sets of waves separated by a solid line. The lines are equal distance apart and equal distance from the middle line.
D
Image with description A radio wave going left to right. The waves are wide and equal distance as well as equal distance above and below the middle line.
5

Which best explains the arrow’s purpose in the diagram?

A
It is showing the direction that electrons move in, making the sphere positive.
B
It is showing the direction that electrons move in, making the sphere negative.
C
It is showing the direction that protons move in, making the sphere negative.
D
It is showing the direction that protons move in, making the sphere positive.
6

Which describes the image produced by the lens?

A
inverted and larger than the object
B
real and smaller than the object
C
upright and larger than the object
D
real and larger than the object
7

What is the amplitude of the resulting wave when the two waves meet at point cap x ?

A
2 point 0 cm
B
0 point 0 cm
C
1 point 0 cm
D
4 point 0 cm
8

After picking up several staples with the device, what change would enable Tony to drop the staples in the scrap metal bin?

A
moving the wire loops closer together
B
removing the iron nail
C
removing the battery
D
spreading the wire loops farther apart
9

Which shows the motion of the rope at Point P as the wave passes through it?

A
Image with description A dot with a vector drawn right and a vector drawn left.
B
Image with description A dot vector drawn up and vector drawn down.
C
Image with description A dot with a vector drawn up to the left and a vector drawn down to the right.
D
Image with description A dot with a vector drawn up to the right and a vector drawn down to the left.
10

A 6 centimeters object is 15 centimeters from a convex lens that has a focal length of 5 centimeters What is the distance of the image from the lens, to the nearest hundredth?

A
33 point 3 3 centimeters
B
7 point 5 0 centimeters
C
negative 33 point 3 3 centimeters
D
negative 7 point 5 0 centimeters
12

Which changes in an electric motor will make the motor stronger? Choose three correct answers.

A
using a stronger permanent magnet
B
decreasing the distance between the magnets
C
using a weaker permanent magnet
D
increasing current in the electromagnet
E
decreasing current in the electromagnet
F
increasing the distance between the magnets
13

What is the best description of a wave?

A
a medium disturbed by a vibration
B
matter that is moved from one place to another
C
a pulse that carries energy
D
a disturbance that moves matter
14

How much time was required? A current of 1 point 8 cap A delivers 2 point 5 cap c of charge.

A
4 point 5 s
B
0 point 7 2 s
C
0 point 7 0 s
D
1 point 4 s
15

A charge of 8 point 4 times 10 to the negative 4 power cap c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6 point 7 times 10 to the negative 3 power T If the magnetic force is 3 point 5 times 10 to the negative 2 power cap n , how fast is the charge moving?

A
9 point 1 times 10 to the negative 5 power m/s
B
1 point 1 times 10 to the 4th power m/s
C
7 point 6 times 10 cubed m/s
D
1 point 3 times 10 to the negative 4 power m/s
16

A boat moves up and down on a lake as a wave passes by. If the boat oscillates 10 times in 2 seconds, what is the period of the wave?

A
10 seconds
B
0 point 2 seconds
C
2 seconds
D
5 seconds
17

An 8 point 0 centimeters object is 40 point 0 centimeters from a concave mirror that has a focal length of 10 point 0 centimeters Its image is 16 point 0 centimeters in front of the mirror.

Answer:

16.0

18

Force cap f acts between two charges, q sub 1 and q sub 2 , separated by a distance d If q sub 1 is increased to twice its original value and the distance between the charges is also doubled, what is the new force acting between the charges in terms of cap f ?

A
1 fourth cap f
B
1 half cap f
C
cap f
D
2 cap f
19

The power rating of a clock is 10 cap w , and the cost of electrical energy is 0 point 1 5 dollars per kilowatt-hour. Rounded to the nearest cent, how much does it cost to run the clock for one whole week?

A
0 point 2 5 dollars
B
11 point 2 0 dollars
C
0 point 0 4 dollars
D
1 point 6 8 dollars
20

Which diagram best illustrates the magnetic field of a bar magnet?

A
Image with description A bar magnet with a north and south pole. Field line vectors are leaving the north pole and curl around to the south pole.
B
Image with description A bar magnet with a north and south pole. Field line vectors are leaving the north pole and curl around to the south pole.
C
Image with description A bar magnet with a north and south pole. Field line vectors are leaving the south pole and curl around to the north pole.
D
Image with description A bar magnet with a north and south pole. Field line vectors are leaving the south pole and curl around to the north pole.
21

A bell is rung. What best describes the density of air around the bell?

A
The air density decreases and then returns to normal levels.
B
The air density does not change.
C
The air density increases and decreases repeatedly before returning to normal.
D
The air density increases and then returns to normal levels.
22

A lightbulb has a resistance of 195 cap omega and carries a current of 0 point 6 2 cap A

Answer:

121

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