The least count of a stop watch is 0.4 second. The time of 30 oscillations of a pendulum is measured to be 50 seconds. The maximum percentage error in this measurement is found to be 0.x%. What is the value of x

Asked by Anil | 22nd May, 2017, 02:16: PM

Expert Answer:

begin mathsize 12px style Percentage space error space in space measuring space time space period space is
straight n equals ΔT over straight T cross times 100
therefore straight n equals fraction numerator Least space count over denominator Measured space value end fraction cross times 100
straight n equals fraction numerator 0.4 over denominator 50 end fraction cross times 100 equals 0.8 percent sign
Therefore comma space the space value space of space straight x space is space 8. end style

Answered by Romal Bhansali | 23rd May, 2017, 09:25: AM