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NEET NEET SOLVED PAPER 2014

  • question_answer
    Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 V and the average resistance per km is 0.5\[\Omega \]. The power loss in the wire is  [AIPMT 2014]

    A)  19.2 W

    B)  19.2kW

    C)  19.2J

    D)  12.2kW

    Correct Answer: B

    Solution :

    Potential difference (drop) between two cities \[=150\,\times 8\,=1200\,\text{V}\] Average resistance of total wire = \[0.5\times 150\] \[=75\Omega \] Power loss \[P=\frac{{{V}^{2}}}{R}=\frac{1200\times 1200}{75}=19200W\] \[=19.2kW\]


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