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| 1 . |
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The following information pertains to questions 1 and 2.  The current through a device is measured as a function of the potential difference across the device for several different devices. The results are plotted in the figure at the right.
The Ohmic device which has the largest resistance is represented by the curve labeled ___.
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| 2 . |
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The Ohmic device which has the smallest resistance is represented by the curve labeled ___.
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| 3 . |
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The following information pertains to questions 3 and 4.  A variable resistor is wired in series with an ammeter and a battery with negligible internal resistance as in the figure at the right.
If the resistance of the resistor was increased slightly, the current in the circuit as indicated by the ammeter would ___.
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| 4 . |
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If the resistance of the resistor was increased slightly, the rate at which work would be done on the resistor by the battery would ___.
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| 5 . |
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The following information pertains to questions 5-10.  The resistance of seven different resistors is measured as a function of the temperature of the resistors. The results are plotted at the right.
The temperature coefficient of resistance of the resistor represented by the curve labeled C, i. e., a (C) is ___ a (D).
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| 6 . |
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Of the seven resistors, the one for which the magnitude of the temperature coefficient of resistance is smallest is represented by the curve labeled ___.
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| 7 . |
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Of the seven resistors, the one for which the magnitude of the temperature coefficient of resistance is largest is represented by the curve labeled ___.
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| 8 . |
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a (F) is ___ a (E).
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| 9 . |
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a (B) is ___ a (E).
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| 10 . |
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a (E) is ___ a (C).
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| 11 . |
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The following information pertains to questions 11-13.  In the circuit at the right a single source of emf, E1, with internal resistance r1 is connected to a variable load resistance Rload > r.
If the resistance of the load was increased slightly, the current flowing through the load resistance would ___.
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| 12 . |
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If the resistance of the load was decreased slightly, the potential difference across the terminals of the emf would ___.
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| 13 . |
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If the resistance of the load was increased slightly, the rate at which heat is being created within the seat of emf would ___.
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| 14 . |
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The following information pertains to questions 14-16.  In the circuit at the right, four identical cells each with an emf of 2 V and negligible internal resistance are connected together in series and parallel as shown.
The magnitude of the net emf applied across the load resistance is ___ V.
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| 15 . |
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The current through cell 3 is ___ the current through cell 1.
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| 16 . |
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If cell 1 was turned around in the circuit, the rate at which heat is being created within the load resistance would ___.
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| 17 . |
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The following information pertains to questions 17-21.  In the circuit at the right,
e 1 > e 2, r1 = r2 and R1 < R2.
If the resistance of the resistor R1 was decreased slightly, the reading of the ammeter would ___.
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| 18 . |
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If the resistance R1 was increased slightly, the potential difference across the resistance R2 would ___.
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| 19 . |
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If the resistance R1 was decreased slightly, the difference in potential across the terminals of the first source of emf, i.e., VT1, would ___.
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| 20 . |
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If e 2 was decreased slightly, the difference in potential across the terminals of the first source of emf, i.e., VT1, would ___.
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| 21 . |
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If the resistance R1 was decreased slightly, e1 would ___.
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