1.
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The above animation represents a solenoid surrounded by a wire that makes four loops around the solenoid (position is given in meters and the magnetic field is given in mTesla). You may double-click anywhere inside the animation to add a magnetic field line and you may click-drag anywhere to measure the magnetic field strength at that point. What is the mutual inductance of this orientation if the current in the wires of the solenoid is 2 Amperes? Start
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| 0.52mH. |
| Insufficient Information. |
| 0.032mH. |
| 0.13mH. |
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2.
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The above animation represents a solenoid with a self inductance of 10mH (position is given in centimeters and the magnetic field is given in m Tesla). You may double-click anywhere inside the animation to add a magnetic field line and you may click-drag anywhere to measure the magnetic field strength at that point. What is the number of turns of wire that make up the solenoid? Start
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| N=420 turns. |
| Insufficient Information. |
| N=767 turns. |
| N=5.8x105 turns. |
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3.
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The circuit with a battery, an unknown inductor, and an unknown resistor evolves in time after the switch is closed. The graph displays the current flowing from the battery after the switch is closed. What is the time constant of the circuit? Start
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| 0.001 s. |
| 0.0003 s. |
| 0.0009 s. |
| 0.005 s. |
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4.
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The circuit with a battery, an inductor of 20mH and an unknown resistor evolves in time after the switch is closed. The graph displays the current flowing from the battery after the switch is closed. What is the resistance of the unknown resistor? Start
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| 100 Ohm. |
| 800 Ohm. |
| 400 Ohm. |
| 200 Ohm. |
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5.
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The circuit with a battery, an unknown inductor, and 500 Ohm resistor evolves in time after the switch is closed. The graph displays the current flowing from the battery after the switch is closed. What is the inductance of the unknown inductor? Start
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| 100 mH. |
| 800 mH. |
| 400 mH. |
| 200 mH. |
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6.
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The circuit with a battery, an inductor and a 20 Ohm resistor can have a battery connected or disconnected depending on which switch is open. The battery is initially connected (switch 1 is closed and switch 2 is open) and then the battery is disconnected and the system evolves in time. You may look at the current from the graph after the switch 2 is closed and switch 1 is open. What is the inductance of the inductor?
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| 12 mH. |
| 24 mH. |
| 4 mH. |
| 36 mH. |
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7.
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The circuit with an inductor and an initially charged 2mF capacitor, evolves in time. You may determine the current from the graph. What is the inductance of the inductor? Start
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| 0.026 mH. |
| 0.252 mH. |
| 0.126 mH. |
| 1.00 mH. |
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8.
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The circuit with an inductor, a 3.0 Ohm resistor, and an initially charged 4.8 mF capacitor, evolves in time. You may look at the charge on the capacitor from the graph. What is the inductance of the inductor? Start
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| 10 mH. |
| 30 mH. |
| 20 mH. |
| 40 mH. |
