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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The capacitance of a parallel plate capacitor can be altered by dragging (drag from the middle) a conducting block in between the two plates (charge given in mC and position given in centimeters). The light red and light blue circles represent the position of the charge on the conductor. What is the ratio of the new capacitance to the old capacitance? Note: There is a 1-5% intrinsic error in the calculation of charge. Start
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| 1 |
| 0.6 |
| 1.7 |
| 2 |
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9.
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The capacitance of a parallel plate capacitor can be altered by dragging (drag from the middle) the conducting block centered in between the two plates, to either the far right or the far left position (charge given in mC and position given in centimeters). The light red and light blue circles represent the position of the charge on the conductor. What is the ratio of the maximum capacitance to the minimum capacitance? Note: There is a 1-5% intrinsic error in the calculation of charge. Start
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| 1 |
| 0.6 |
| 1.7 |
| 2 |
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10.
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Four identical resistors are connected as shown. You can place the mouse cursor over any component to obtain readings. Which set of readings is correct?
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| Circuit readings A. |
| Circuit readings B. |
| Circuit readings C. |
| Circuit readings D. |
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11.
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A variable resistor, Rl, is connected to a battery consisting of an emf and an unknown internal resistance, Rx. Find the unknown resistance. You can vary the load resistance using the slider. You can place the mouse cursor over any component to obtain readings. Start. Interactive Hint More Help.
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| 20 W. |
| 40 W. |
| 60 W. |
| 80 W. |
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12.
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A variable resistor, RL, is connected to a battery consisting of an emf and an unknown internal resistance, Rx. Find the unknown resistance. You can vary the load resistance using the slider. You can place the mouse cursor over any component to obtain readings. Start.
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| 20 W. |
| 40 W. |
| 60 W. |
| 80 W. |
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13.
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Three identical light bulbs are connected as shown but one light bulb is burned out. Which bulb is it? You can read component values by placing the mouse over a component. Start.
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| Bulb 1. |
| Bulb 2. |
| Bulb 3. |
| Either bulb 2 or bulb 3.
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14.
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Three identical light bulbs and a switch are connected to form a circuit. The open switch readings are correct but only one of 4 possible sets of values is correct with the switch closed. Which set of readings is correct? You can read values by placing the mouse over a component. Start with an open switch. Close the switch:
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| Readings A. |
| Readings B. |
| Readings C. |
| Readings D. |
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15.
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Three resistors are connected to a battery as shown. How much current is flowing from the battery? You can read component values by placing the mouse over a component. Start.
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| 0.10 A. |
| 0.15 A. |
| 0.20 A. |
| 0.25 A. |
