2

Question 1

A) Rotate the loop about an axis that is parallel to the field and passes through the center of the loop.
B) Increase the strength of the magnetic field.
C) Decrease the area of the loop.
D) Decrease the strength of the magnetic field.
E) Rotate the loop about an axis that is perpendicular to the field and passes through the center of the loop.

Answer 1

A) Rotate the loop about an axis that is -parallel- to the field and passes through the center of the loop.

Question 2

A)  T  m/s
B)  V  m2/s
C)  J/s
D)  A  
E)  T  m

Answer 2

D) A x Omega

Question 3

A) decreasing the area of the loop
B) decreasing the magnitude of the magnetic field
C) increasing the magnitude of the magnetic field
D) rotating the loop through 90∞ about an axis in the plane of the paper
E) all of the above

Answer 3

E) all of the above

Question 4

A)  toward the right
B)  toward the left
C)  parallel to the long axis of the bar
D)  into the page
E)  out of the page

Answer 4

E) out of the page

Question 5

A)  0.38 m/s
B)  0.90 m/s
C)  2.6 m/s
D)  6.5 m/s
E)  8.7 m/s

Answer 5

D) 6.5 m/s

Question 6

A)  1.1 V
B)  0.27 V
C)  0.076 V
D)  9.1 ◊ 10ñ5 V
E)  This cannot be determined without knowing the orientation of the rod relative to the magnetic field.

Answer 6

E) This cannot be determined without knowing the orientation of the rod relative to the magnetic field.

Question 7

A)  0.049 Wb
B)  0.098 Wb
C)  0.24 Wb
D)  0.30 Wb
E)  zero Wb

Answer 7

D) 0.30 Wb

Question 8

A)  1.08 ◊ 10ñ4 Wb
B)  7.11 ◊ 10ñ5 Wb
C)  2.88 ◊ 10ñ5 Wb
D)  1.92 ◊ 10ñ5 Wb
E)  3.30 ◊ 10ñ6 Wb

Answer 8

A) 1.08 ◊ 10ñ4 Wb

Question 9

A)  3.1 ◊ 10ñ4 V
B)  6.3 ◊ 10ñ4 V
C)  1.2 ◊ 10ñ3 V
D)  5.4 ◊ 10ñ3 V
E)  3.1 V

Answer 9

D) 5.4 ◊ 10ñ3 V

Question 10

A)  0.42 T
B)  0.75 T
C)  0.87 T
D)  1.2 T
E)  1.9 T

Answer 10

E) 1.9 T

Question 11

A)  1.8 ◊ 10ñ5 Wb
B)  9.9 ◊ 10ñ5 Wb
C)  3.6 ◊ 10ñ4 Wb
D)  7.0 ◊ 10ñ4 Wb
E)  2.2 ◊ 10ñ3 Wb

Answer 11

C) 3.6 ◊ 10ñ4 Wb

Question 12

A)  0.053 s
B)  0.13 s
C)  12 s
D)  6.4 s
E)  7.3 s

Answer 12

E) 7.3 s

Question 13

A)  ñ18 mV
B)  ñ49 mV
C)  ñ92 mV
D)  ñ140 mV
E)  ñ180 mV

Answer 13

A) ñ18 mV

Question 14

A)  0.43 V
B)  0.65 V
C)  0.014 V
D)  0.027 V
E)  0.038 V

A)  2.8 ◊ 10ñ3 A, clockwise
B)  4.5 ◊ 10ñ3 A, clockwise
C)  4.5 ◊ 10ñ3 A, counterclockwise
D)  9.0 ◊ 10ñ3 A, clockwise
E)  9.0 ◊ 10ñ3 A, counterclockwise

A)  8.6 ◊ 10ñ3 V
B)  9.8 ◊ 10ñ2 V
C)  2.7 ◊ 10ñ2 V
D)  5.4 ◊ 10ñ2 V
E)  6.4 ◊ 10ñ2 V

A)  1.8 ◊ 10ñ2 W
B)  3.6 ◊ 10ñ2 W
C)  3.8 ◊ 10ñ3 W
D)  2.7 ◊ 10ñ4 W
E)  4.9 ◊ 10ñ4 W

Answer 14

C) 0.014 V

D) 9.0 ◊ 10ñ3 A, clockwise

C) 2.7 ◊ 10ñ2 V

E) 4.9 ◊ 10ñ4 W

Question 15

Conducting Loop:
A) There will be no induced emf and no induced current.
B) There will be an induced emf, but no induced current.
C) There will be an induced current that is clockwise around the loop.
D) There will be an induced current that is counterclockwise around the loop.
E) There will be an induced electric field that is clockwise around the loop.

Non-conducting Loop:
A) There will be no induced emf and no induced current.
B) There will be a counterclockwise induced emf, but no induced current.
C) There will be a clockwise induced emf, but no induced current.
D) There will be a clockwise induced current in the loop.
E) There will be a counterclockwise induced current in the loop.

Answer 15

D) There will be an induced current that is counterclockwise around the loop.

B) There will be a counterclockwise induced emf, but no induced current.

Both Counterclockwise

Question 16

A) As the ring falls, an induced current will flow counterclockwise as viewed by the observer.
B) As the ring falls, an induced current will flow clockwise as viewed by the observer.
C) As the ring falls, there will be an induced magnetic field around the ring that appears counterclockwise as viewed by the observer.
D) As the ring falls, there will be an induced magnetic field around the ring that appears clockwise as viewed by the observer.
E) Since the magnet is stationary, there will be no induced current in the ring.

Answer 16

A) As the ring falls, an induced current will flow counterclockwise as viewed by the observer.

Question 17

A) The current in the lower loop will decrease.
B) The current in the lower loop will increase.
C) The current in the lower loop will not change.
D) The current in the lower loop will also drop to zero.
E) The current in the lower loop will reverse its direction.

Answer 17

B) The current in the lower loop will increase.

Question 18

Sheet of copper, constant V
A) The magnetic field points to the right.
B) The magnetic field points to the left.
C) The magnetic field points into the paper.
D) The magnetic field points out of the paper.
E) The direction of the magnetic field cannot be determined from the information given.

Answer 18

D) The magnetic field points out of the paper.

Question 19

24. Which one of the following statements concerning this situation is true?
    A) The temperature of the circuit remains constant.
    B) The induced current flows clockwise around the circuit.
    C) Since the circuit moves with constant speed, the force F does zero work.
    D) If the circuit were replaced with a wooden loop, there would be no induced emf.
    E) As the circuit moves through the field, the field does work to produce the current.

A)  1.5 m/s
B)  4.6 m/s
C)  6.4 m/s
D)  7.8 m/s
E)  9.0 m/s

Answer 19

B) The induced current flows clockwise around the circuit.

B) 4.6 m/s

Question 20

DIAGRAM WITH A CRANK
A)  28 rad/s
B)  50 rad/s
C)  130 rad/s
D)  200 rad/s
E)  490 rad/s

Answer 20

D) 200 rad/s

Question 21

A)  32.3 V
B)  44.7 V
C)  52.5 V
D)  89.4 V
E)  152 V

Answer 21

B) 44.7 V

Question 22

SINUSOIDAL GRAPH: 
A)  0.16 rad/s
B)  0.30 rad/s
C)  0.52 rad/s
D)  0.80 rad/s
E)  1.26 rad/s

A)  1.25 s
B)  2.50 s
C)  3.75 s
D)  5.00 s
E)  6.25 s

A)  0.5 T
B)  2.4 T
C)  3.0 T
D)  7.5 T
E)  18.8 T

Answer 22

E) 1.26 rad/s

D) 5.00 s

C) 3.0 T

Question 23

current INCREASES with time, relates emf and increasing current?
A)  resistance of the loop
B)  capacitance of the loop
C)  self-inductance of the loop
D)  power dissipated by the loop
E)  mutual inductance of the loop

Answer 23

C) self-inductance of the loop

Question 24

solenoid current decreased to 1/2, which is true concerning self-inductance?
A) The self-inductance does not change.
B) The self-inductance increases by a factor of two.
C) The self-inductance decreases by a factor of two.
D) The self-inductance increases by a factor of four.
E) The self-inductance decreases by a factor of four.

Answer 24

A) The self-inductance does not change.

Question 25

``` A) 2.11 ◊ 10ñ8 J B) 3.78 ◊ 10ñ8 J C) 1.09 ◊ 10ñ7 J D) 7.98 ◊ 10ñ7 J E) 6.60 ◊ 10ñ6 J ```

Answer 25

D) 7.98 ◊ 10ñ7 J

Question 26

``` A) 0.10 J B) 2.8 J C) 0.18 J D) 28 J E) 0.36 J ```

Answer 26

C) 0.18 J

Question 27

One Henry

Answer 27

N x m x s2/C2

Question 28

``` A) 0.33 H B) 0.60 H C) 1.5 H D) 3.0 H E) 5.0 H ```

Answer 28

A) 0.33 H

Question 29

``` 2 Coil DIAGRAM: A) 5.8 ◊ 10ñ4 V B) 1.7 ◊ 10ñ3 V C) 3.5 ◊ 10ñ3 V D) 1.5 ◊ 10ñ2 V E) 2.1 ◊ 10ñ2 V ```

Answer 29

E) 2.1 ◊ 10ñ2 V

Question 30

``` A) 7.4 J B) 4.6 J C) 1.6 J D) 5.1 J E) 3.4 J ```

Answer 30

A) 7.4 J

Question 31

``` *5 Part Question: 0.100m solenoid DIAGRAM A) 2.95 ◊ 10ñ2 Wb B) 7.28 ◊ 10ñ2 Wb C) 2.95 ◊ 10ñ4 Wb D) 4.38 ◊ 10ñ4 Wb E) 5.92 ◊ 10ñ4 Wb ``` ``` A) 1.8 ◊ 10ñ4 H B) 2.4 ◊ 10ñ4 H C) 3.6 ◊ 10ñ4 H D) 4.4 ◊ 10ñ4 H E) 5.9 ◊ 10ñ4 H ``` ``` A) 0.7 ◊ 10ñ3 V B) 1.4 ◊ 10ñ3 V C) 2.8 ◊ 10ñ3 V D) 5.6 ◊ 10ñ3 V E) zero volts ``` ``` WHEN PERPENDICULAR A) 0.7 ◊ 10ñ4 V B) 1.4 ◊ 10ñ4 V C) 2.8 ◊ 10ñ4 V D) 5.6 ◊ 10ñ4 V E) zero volts ``` ``` A) 60 V B) 98 V C) 130 V D) 180 V E) 250 V ```

Answer 31

E) 5.92 ◊ 10ñ4 Wb B) 2.4 ◊ 10ñ4 H B) 1.4 ◊ 10ñ3 V E) zero volts (WHEN PERPENDICULAR) C) 130 V

Question 32

*7 Part Question: 2 coils, one small, one large: 44. Immediately after the switch S is closed, which one of the following statements is true? A) An induced current will flow from right to left in R. B) An induced current will flow from left to right in r. C) A magnetic field that points toward B appears inside coil 1. D) An induced magnetic field that points toward B appears inside coil 2. E) A current will pass through r, but there will be no current through R. 45. Assume the switch S has been closed for a long time. Which one of the following statements is true? A) An induced current will flow from right to left in R. B) An induced current will flow from left to right in r. C) A magnetic field that points toward B appears inside coil 1. D) An induced magnetic field that points toward B appears inside coil 2. E) A current will pass through r, but there will be no current through R. Question Concerning S, 1, and B

Answer 32

A) An induced current will flow from right to left in R. E) A current will pass through r, but there will be no current through R. D) There is an induced current in R that flows from right to left.

Question 33

*7 Part Question: 2 coils, one small, one large:

Answer 33

The remaining 4 questions have B in their answers

Question 34

A) The induced current in the ring is an alternating current. B) The temperature of the ring will increase. C) At any instant, the direction of the induced current in the ring is in the same direction as that in the coil. D) The induced magnetic field in the ring may by directed either upward or downward at an instant when the direction of the magnetic field generated by the current in the coil is upward. E) The ring may remain suspended at the position shown with no vertical movement of its center of mass.

Answer 34

C) At any instant, the direction of the induced current in the ring is in the same direction as that in the coil.

Question 35

``` Ratio: A) 5.6 B) 4.2 C) 0.24 D) 0.18 E) 0.12 ```

Answer 35

C) 0.24

Question 36

Which statement is false? A) Their operation makes use of mutual induction. B) They are an application of Faraday's and Lenz's laws. C) A transformer can function with either an ac current or a steady dc current. D) A transformer that steps down the voltage, steps up the current. E) A transformer that steps up the voltage, steps down the current.

Answer 36

C) A transformer can function with either an ac current or a steady dc current.

Question 37

``` A) 40 B) 80 C) 100 D) 400 E) 4000 ```

Answer 37

B) 80

Question 38

P: 450 turns, S: 30 turns A) This is a step-up transformer. B) The turns ratio is 15 for this transformer. C) The ratio of the voltages Vs / Vp is 15 for this transformer. D) The ratio of the currents Is / Ip is 0.067 for this transformer. E) The power delivered to the secondary must be the same as that delivered to the primary.

Answer 38

E) The power delivered to the secondary must be the same as that delivered to the primary.

Question 39

``` A) 3.8 A B) 5.2 A C) 6.4 A D) 7.0 A E) 7.5 A ```

Answer 39

A) 3.8 A

Question 40

``` power lost A) 0.47 % B) 0.41 % C) 0.34 % D) 0.23 % E) 0.12 % ```

Answer 40

E) 0.12 %

Question 41

With chart referring to Diagram, regarding change in the system and direction of current through R: ``` A) 12.0 T/s B) 18.8 T/s C) 24.0 T/s D) 37.7 T/s E) 49.2 T/s ```

Answer 41

Answer: the only option that has "B" in it A) 12.0 T/s

Question 42

2 Diagrams in DIAGRAM, circle and line graph: | CHART: concerning time and induced emf

Answer 42

Answer: largest option | 9s 10V, counterclockwise

Question 43

``` DIAGRAM: loop pulled with a force F A) zero volts B) 0.77 V C) 1.4 V D) 4.9 V E) 9.6 V ``` ``` A) 0.048 A B) 0.024 A C) 7.2 ◊ 10ñ3 A D) 3.8 ◊ 10ñ3 A E) zero amperes ``` ``` A) 1.3 ◊ 10ñ4 N B) 2.1 ◊ 10ñ4 N C) 3.7 ◊ 10ñ4 N D) 6.8 ◊ 10ñ4 N E) 9.0 ◊ 10ñ4 N ```

Answer 43

B) 0.77 V D) 3.8 ◊ 10ñ3 A C) 3.7 ◊ 10ñ4 N

Question 44

*5 PART QUESTION DIAGRAM: A loop with a resistance of 4.0  is pushed to the left at a constant speed ``` A) to the left B) to the right C) out of the paper D) into the paper E) toward the top of the page ``` ``` A) 2.0 A B) 3.5 A C) 4.6 A D) 7.2 A E) 11 A ``` ``` A) 2.0 V B) 4.0 V C) 8.0 V D) 14 V E) 16 V ``` ``` A) 2.2 T B) 3.5 T C) 6.4 T D) 7.0 T E) 9.1 T ``` ``` A) 130 W B) 96 W C) 32 W D) 49 W E) 8.0 W ```

Answer 44

D) into the paper if you see "toward the top of the page," you know it's into the paper B) 3.5 A D) 14 V B) 3.5 T D) 49 W

Question 45

``` DIAGRAM: 2 pictures, circle and squished circle A) 1.2 ◊ 10ñ1 V B) 1.8 ◊ 10ñ2 V C) 1.8 ◊ 102 V D) 5.9 ◊ 10-2 V E) 5.9 ◊ 102 V ``` ``` A) 3.6 ◊ 10ñ3 W B) 8.7 ◊ 10-4 W C) 8.7 ◊ 104 W D) 8.1 ◊ 105 W E) 8.1 ◊ 10ñ5 W ```

Answer 45

D) 5.9 ◊ 10-2 V B) 8.7 ◊ 10-4 W

Question 46

``` 71. Which one of the following phrases best describes the direction of the induced magnetic field generated by the current induced in the loop while the loop is being stretched? A) clockwise B) counterclockwise C) into the page D) out of the page E) The induced field is zero. ```

Answer 46

C) into the page