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March 25, 2017

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A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s.
(a) What is the current in the wire?
1 A
(b) How many electrons pass the cross-sectional area in 1.0 min?
2 electrons

  • physics - ,

    I =q/t = 47•10^-3/19 =2.47•10^-3 A .
    Q =I•t1 = 2.47•10^-3 • 60 = 0.148 C.
    N =Q/e = 0.148/1.6•10^-19= 9.3•10^17

  • physics - ,

    both of these are wrong?

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