# Physics equations/23-Electromagnetic Induction, AC Circuits, and Electrical Technologies/Q:spaceTetherAndSimpleLoop

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Only two of these problems have been placed on Quizbank (first and last)

- Solutions to many wikiquiz questions (pdf)
**Solution at page 821 of***Example 23.2 Calculating the Large Motional Emf of an Object in Orbit.*(*openstax College Physics*)- See also
*Wikipedia:Space tether missions* - This bad version of this quiz needs to be fixed so that more questions can be added here. Also a name change would help.

Study: http://en.wikiversity.org/wiki/Physics_equations/Sheet/All_chapters

## a23InductionACcircuits_Q1_v1[edit | edit source]

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===2=== {<!--a23InductionACcircuits_Q1_1-->Two orbiting satellites are orbiting at a speed of 77 km/s perpendicular to a magnetic field of 56 μT. They are connected by a cable that is 31 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?} -a) 1.1 x 10<sup>5</sup> volts. +b) 1.34 x 10<sup>5</sup> volts. -c) 1.62 x 10<sup>5</sup> volts. -d) 1.96 x 10<sup>5</sup> volts. -e) 2.38 x 10<sup>5</sup> volts. ===3=== {<!--a23InductionACcircuits_Q1_1-->Two orbiting satellites are orbiting at a speed of 66 km/s perpendicular to a magnetic field of 64 μT. They are connected by a cable that is 37 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?} -a) 1.29 x 10<sup>5</sup> volts. +b) 1.56 x 10<sup>5</sup> volts. -c) 1.89 x 10<sup>5</sup> volts. -d) 2.29 x 10<sup>5</sup> volts. -e) 2.78 x 10<sup>5</sup> volts. ===4=== {<!--a23InductionACcircuits_Q1_1-->Two orbiting satellites are orbiting at a speed of 53 km/s perpendicular to a magnetic field of 58 μT. They are connected by a cable that is 29 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?} -a) 7.36 x 10<sup>4</sup> volts. +b) 8.91 x 10<sup>4</sup> volts. -c) 1.08 x 10<sup>5</sup> volts. -d) 1.31 x 10<sup>5</sup> volts. -e) 1.59 x 10<sup>5</sup> volts. ===5=== {<!--a23InductionACcircuits_Q1_1-->Two orbiting satellites are orbiting at a speed of 83 km/s perpendicular to a magnetic field of 57 μT. They are connected by a cable that is 23 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?} -a) 8.98 x 10<sup>4</sup> volts. +b) 1.09 x 10<sup>5</sup> volts. -c) 1.32 x 10<sup>5</sup> volts. -d) 1.6 x 10<sup>5</sup> volts. -e) 1.93 x 10<sup>5</sup> volts. ===6=== {<!--a23InductionACcircuits_Q1_1-->Two orbiting satellites are orbiting at a speed of 52 km/s perpendicular to a magnetic field of 41 μT. They are connected by a cable that is 33 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?} -a) 4.79 x 10<sup>4</sup> volts. -b) 5.81 x 10<sup>4</sup> volts. +c) 7.04 x 10<sup>4</sup> volts. -d) 8.52 x 10<sup>4</sup> volts. -e) 1.03 x 10<sup>5</sup> volts. ===7=== {<!--a23InductionACcircuits_Q1_1-->Two orbiting satellites are orbiting at a speed of 58 km/s perpendicular to a magnetic field of 46 μT. They are connected by a cable that is 22 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?} -a) 2.72 x 10<sup>4</sup> volts. -b) 3.3 x 10<sup>4</sup> volts. -c) 4 x 10<sup>4</sup> volts. -d) 4.84 x 10<sup>4</sup> volts. +e) 5.87 x 10<sup>4</sup> volts. ===8=== {<!--a23InductionACcircuits_Q1_1-->Two orbiting satellites are orbiting at a speed of 70 km/s perpendicular to a magnetic field of 46 μT. They are connected by a cable that is 30 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?} -a) 4.48 x 10<sup>4</sup> volts. -b) 5.43 x 10<sup>4</sup> volts. -c) 6.58 x 10<sup>4</sup> volts. -d) 7.97 x 10<sup>4</sup> volts. +e) 9.66 x 10<sup>4</sup> volts. |

## a23InductionACcircuits_Q1_v1[edit | edit source]

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===2=== {<!--a23InductionACcircuits_Q1_4-->An loop of wire with 26 turns has a radius of 0.26 meters, and is oriented with its axis parallel to a magetic field of 0.75 Tesla. What is the induced voltage if this field is reduced to 13% of its original value in 1.8 seconds?} +a) 2 x 10<sup>0</sup> volts -b) 2.42 x 10<sup>0</sup> volts -c) 2.94 x 10<sup>0</sup> volts -d) 3.56 x 10<sup>0</sup> volts -e) 4.31 x 10<sup>0</sup> volts ===3=== {<!--a23InductionACcircuits_Q1_4-->An loop of wire with 92 turns has a radius of 0.39 meters, and is oriented with its axis parallel to a magetic field of 0.97 Tesla. What is the induced voltage if this field is reduced to 16% of its original value in 1.4 seconds?} +a) 2.56 x 10<sup>1</sup> volts -b) 3.1 x 10<sup>1</sup> volts -c) 3.76 x 10<sup>1</sup> volts -d) 4.55 x 10<sup>1</sup> volts -e) 5.51 x 10<sup>1</sup> volts ===4=== {<!--a23InductionACcircuits_Q1_4-->An loop of wire with 80 turns has a radius of 0.52 meters, and is oriented with its axis parallel to a magetic field of 0.15 Tesla. What is the induced voltage if this field is reduced to 19% of its original value in 3.6 seconds?} -a) 1.06 x 10<sup>0</sup> volts -b) 1.29 x 10<sup>0</sup> volts -c) 1.56 x 10<sup>0</sup> volts -d) 1.89 x 10<sup>0</sup> volts +e) 2.29 x 10<sup>0</sup> volts ===5=== {<!--a23InductionACcircuits_Q1_4-->An loop of wire with 43 turns has a radius of 0.27 meters, and is oriented with its axis parallel to a magetic field of 0.68 Tesla. What is the induced voltage if this field is reduced to 36% of its original value in 3.8 seconds?} -a) 6.34 x 10<sup>-1</sup> volts -b) 7.68 x 10<sup>-1</sup> volts -c) 9.31 x 10<sup>-1</sup> volts +d) 1.13 x 10<sup>0</sup> volts -e) 1.37 x 10<sup>0</sup> volts ===6=== {<!--a23InductionACcircuits_Q1_4-->An loop of wire with 54 turns has a radius of 0.8 meters, and is oriented with its axis parallel to a magetic field of 0.86 Tesla. What is the induced voltage if this field is reduced to 46% of its original value in 2.4 seconds?} -a) 1.43 x 10<sup>1</sup> volts -b) 1.73 x 10<sup>1</sup> volts +c) 2.1 x 10<sup>1</sup> volts -d) 2.55 x 10<sup>1</sup> volts -e) 3.08 x 10<sup>1</sup> volts ===7=== {<!--a23InductionACcircuits_Q1_4-->An loop of wire with 31 turns has a radius of 0.9 meters, and is oriented with its axis parallel to a magetic field of 0.83 Tesla. What is the induced voltage if this field is reduced to 35% of its original value in 1.7 seconds?} -a) 2.07 x 10<sup>1</sup> volts +b) 2.5 x 10<sup>1</sup> volts -c) 3.03 x 10<sup>1</sup> volts -d) 3.67 x 10<sup>1</sup> volts -e) 4.45 x 10<sup>1</sup> volts ===8=== {<!--a23InductionACcircuits_Q1_4-->An loop of wire with 33 turns has a radius of 0.55 meters, and is oriented with its axis parallel to a magetic field of 0.74 Tesla. What is the induced voltage if this field is reduced to 32% of its original value in 2.4 seconds?} -a) 5.43 x 10<sup>0</sup> volts +b) 6.58 x 10<sup>0</sup> volts -c) 7.97 x 10<sup>0</sup> volts -d) 9.65 x 10<sup>0</sup> volts -e) 1.17 x 10<sup>1</sup> volts |