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  1. When 12 V are applied across a 68 resistor, the current is

  2. A.
    816 mA
    B.
    17.6 mA
    C.
    176 mA
    D.
    8.16 mA

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  3. Approximately how much current flows through a 3.3 M resistor across a 30 V source?

  4. A.
    9 A
    B.
    90 A
    C.
    900 A
    D.
    9000 A

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  5. A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.

  6. A.
    40
    B.
    4
    C.
    2
    D.
    20

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  7. What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?

  8. A.
    183
    B.
    18.3
    C.
    66
    D.
    6.6

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  9. What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?

  10. A.
    8.2 k
    B.
    820
    C.
    8.2
    D.
    82

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