1.
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There are three unknown circuit elements connected to a voltage source as shown. The voltage is controlled by the slider and given in Volts. You can measure the voltage and current by placing the mouse cursor over either meter or by looking at the graph. Determine which elements obey Ohm's law.
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| Element 1. |
| Element 2. |
| Element 3. |
| All of the elements. |
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2.
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An unknown resistor is connected to a voltage source as shown. The voltage is controlled by the slider. You can measure the voltage and current by placing the mouse cursor over either meter. Find the unknown resistance. Start Interactive Hint More Help.
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| 0.02 W. |
| 0.05 W. |
| 20 W. |
| 50 W. |
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3.
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You are given four unknown parts and are asked to place them one by one into a test circuit. The source voltage in the circuit is controlled by the slider. You can measure the voltage and current by placing the mouse cursor over either meter. Which part obeys Ohm's law?
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| Unknown Part A. |
| Unknown Part B. |
| Unknown Part C. |
| Unknown Part D. |
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4.
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You are given four unknown parts and are place them obey by one into the circuit as shown. The source voltage is controlled by the slider. You can place the mouse cursor over any component to obtain readings. Which part obeys Ohm's law?
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| Unknown Part A. |
| Unknown Part B. |
| Unknown Part C. |
| None of the above.
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5.
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An unknown device, not necessarily a resistor, is connected to an ideal battery as shown. You can place the mouse cursor over any component to obtain readings. Find the power consumed by this device when the battery voltage is 20 V. Start Interactive Hint More Help.
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| 150 W. |
| 160 W. |
| 170 W. |
| 180 W. |
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6.
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There is a resistor in a circuit connected to a voltage source as shown. The voltage is controlled by the slider and given in Volts. You can measure the voltage and current by placing the mouse cursor over either meter or by looking at the graphs. Determine which graph(s) correctly represent the variables shown.
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| Graph A. |
| Graphs A, D, and E. |
| Graphs B and C. |
| All of the Graphs. |
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7.
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There is a resistor in a circuit connected to a voltage source as shown. The voltage is controlled by the slider and given in Volts. You can measure the voltage and current by placing the mouse cursor over either meter or by looking at the graphs. Determine which graph(s) correctly represent the variables shown.
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| Graph D. |
| Graphs B, D, and E. |
| Graphs A and C. |
| All of the Graphs. |
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8.
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An unknown resistor is connected to an AC voltage source as shown. The rms source voltage is controlled by the slider. Find the unknown resistance if current is measured in milliAmp, mA. You can click-drag inside the graph to measure coordinates and place the mouse on a circuit component to obtain readings. Start
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| 0.5 W. |
| 50 W. |
| 500 W. |
| 5000 W. |
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9.
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An unknown resistor is connected to an AC voltage source as shown. The rms source voltage is controlled by the slider. Find the average power being delivered to the resistor when the rms voltage is 10 V. Assume that the current graph shows units in Ampere, A. You can measure values by placing the mouse cursor over any component of the circuit. You can click-drag inside the graph to measure (x,y) coordinates. Start
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| 40 W. |
| 57 W. |
| 80 W. |
| 114 W. |
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10.
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An oscilloscope is connected to a sine ac supply voltage as shown above. Use the graph to determine the maximum voltage Vmax and the effective voltage Vrms . By clicking in the graph window, you can read the voltage values. Start
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| 325 V / 230 V. |
| 325 V / 200 V. |
| 325 V / 0 V. |
| 325 V / 325 V. |
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11.
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An unknown resistor is connected to an AC voltage source as shown. Use the two graphs to determine the resistance of the resistor. You may click in the graph window to read values for voltage and current. Start
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| 4 Ohm. |
| 0.4 Ohm. |
| 0.25 Ohm. |
| 8 Ohm. |
