10th Class Science Magnetic Effects of Electric Current Question Bank 10th CBSE Science Magnetic Effects of Electric Current

  • question_answer
        An alternating current has frequency of 50 Hz. How many times does it change its direction in one second?     

    Answer:

                      The given frequency is 50 Hz, so AC completes 50 cycles in 1 second. Therefore, it reverses its direction 100 times in one second.


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