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    Potential Difference, Current and Resistance

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    1. In a particular television tube, the beam current is 60.0 MuA. How long does it take for 3.75 x 10^14 electrons to strike the screen?

    2. A stereo with a resistance of 65 ohms is connected across a potential difference of 120 V. What is the current in this device?

    3. The current in a microwave oven is 6.25 A. If the resistance of the oven's circuitry is 17.6 ohms, what is the potential difference across the oven?

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    Solution Preview

    1. In a particular television tube, the beam current is 60.0 Mu A How long does it take for 3.75 x 10^14 electrons to strike the screen?

    Current= 60 Mu A =60x10^(-6) A
    1A=1Coulomb/Second
    A current of 60 Mu A involves the transfer of charge of 60x10^(-6) Coulombs per second= 0.00006 Coulombs/sec
    ...

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