During an experiment, a student sends electromagnetic pulses through a long evacuated tube and finds that the pulses cover a distance of 120m in 4.007×10−7s.
(i) Calculate the experimental value of the speed of the pulses.
(ii) Taking ε0=8.854×10−12C2N−1m−2, use the value obtained in (i) to compute an experimental value of the vacuum permeability μ0.
(iii) The accepted value of μ0 is 4π×10−7NA−2. Determine the percentage deviation of the student’s value from the accepted value.
(iv) List any two possible experimental factors that could account for the deviation obtained in part (iii).