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NEET Sample Paper NEET Sample Test Paper-48

  • question_answer
    A current of 5A is flowing at 220V in the primary coil of a transformer. If the voltage produced in the secondary coil is 220V and 50% of power is lost, then the current in secondary will be:

    A) 2.5A                

    B) 5A    

    C) 0.25A                           

    D) 0.5A

    Correct Answer: A

    Solution :

    In a transformer \[\eta =\frac{{{P}_{o}}}{{{P}_{i}}}\] \[\frac{50}{100}=\frac{{{V}_{s}}{{I}_{s}}}{{{V}_{p}}{{I}_{p}}}\] \[\frac{1}{2}=\frac{220\times {{I}_{s}}}{220}\times 5\] \[{{I}_{s}}=2.5\operatorname{A}\]


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