What is the unit used to measure electric resistance

What is the unit used to measure electric resistance

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  1. T = 0.017s


    period is the time it takes a particle to make one oscillation

    An electric current is periodic in nature

    The current reaches 3.8A  ten times.  

    So there must have been 10 cycles (10 periods) in 0.17s.   let 'T'  be the period:


    t is the total time interval

    n is the number of oscillations


    10T = 0.17

    T = 0.17/10 = 0.017s

  2. The siemens (symbol: S) is the SI derived unit of electric conductance and admittance, also known as the mho (ohm spelled backwards, symbol is ℧); it is the reciprocal of resistance in ohms (Ω).

  3. The period T with which the current at the wall socket changes is 0.017 s.

    It also ranges from 0.155 s to 0.0189 s since the cycles is not given in the question.


    The current reaches 3.8 A once for every cycle. So there must have been 10 cycles (10 periods) in 0.17 s.  

    Using 'T' for period:

                                    10 T = 0.17  

                                          T = 0.17 / 10  

                                         T  = 0.017 s.

    The question doesn't tell about the cycles and so we assume it as 10 cycles. If there are 9 cycles due to the current 3.8 A at the exact beginning and end of 0.17 s. This would make the period T as

                                  0.17 / 9 = 0.0189 s approx.

    Likewise, if the 3.8 A occurs at the end of the 1st cycle, 11 cycles would have passed during 0.17 s.

    In that case the period = 0.17 / 11 = 0.155 s approx.

    So T could be in the range from 0.155 s to 0.0189 s.

  4. the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.

  5. step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

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