Recent content by lewisbedwell

Homework Statement Part A: A 250kVA, 11kV/50Hz supply single phase transformer has 80-turns on the secondary coil, calculate: i. The approximate values of the primary and secondary currents: ii. The approximate number of primary turns iii. The magnitude of the flux in Wb I think I...

Homework Statement Here the gear B is fixed and C and D are on the same drive. If C has 100 teeth, B has 50, D has 50 and E has 200. Calculate the ratio of the gearbox. Homework Equations The Attempt at a Solution My attempt is uploaded as an attachment as putting tables in...

Hi thanks for the reply, I have just worked out the values of A and B, was really struggling with them for some reason. I have: A= 2090.238 and B = -12. Thanks for the pointer about not using adjacent points, I will have a rethink and use further away ones. It makes sense to! Thanks again...

Thanks so much to both of you, I think with what both of you have said I should be fine to get a decent report out of it! Thanks!

I've gone to 14 so far. Do I just need to keep going further? Thanks a lot for replying

Homework Statement It is thought that the law relating the voltage (v) across an inductor and the time(t0) in milliseconds (ms) is given by the relationship v=Ae^(t/B). Where “A” and “b” are constants and “e” is the exponential function. The results of the experimentation are below: V...

Homework Statement Use an appropriate series to compute the value of cosh(1.822) Homework Equations coshx=e^x/2+e^(-x)/2 The Attempt at a Solution I follow the series 1+x+x^2/(2! )…. etc and 1-x+x^2/(2! )…. then add the answers together and divide by 2. However the answers I am...