Recent content by lee.perrin@gm

Hi there Hope this is acurate, and might be worth double checking. What I know is momentum = mass x velocity Call momentum p Lets take a car with mass 500kg movin at velocity 1m/s p = m x v = 500 x 1 = 500 kg.m/s Now the same mass at a slower...

If anyone can advise that would be great. 1. The plane of a 5 turn coil of 5mm² cross sectional area is rotating a 1200 r.p.m in a magnetic field of 10mT. Q. Calculate the amplitude of the induced voltage across the coil Data: 5 turns c = 1200 rpm A = 5cm² B = 10 mT 2. φ =...

Using this equation I get So V(t) = -N•d(B•A)/dt = -N•B•dA/dt = N•B•ω•A•sin(ωt) V(t) =(5)(10x10^-3)(125.66370599999999)(5)sin(ωt) = 31.415 sin(ωt) volts And using the following, saying t = 60 sec Then φ = N.B.A φ = 5×10×10^-3 ×5 × 10^-2 φ = 2.5 ×10^-3 And V = dφ/dt or...

Hi I read through your discussion and seem to think that this might be slightly similar to my question. ( rotating coil in a magnetic field ) And the equation that I have been trying to use limits me as I do not know the length. The picture on the bottom right mentioned. Is Vgenerated the...

Thank you for your help. What I have done was made a mistake where it should be mircosecond not millisecond.

The mF that I have in there is microfarad. I did not have the mu sign. And as it is I don't get that value on the calculator. I get 0.0001sec

Now I have a question: Im working with a signal generator RC circuit. And I am trying to work out t=RC to workout the voltage waveform across the capacitor with the above mentioned formula. This is a very basic formula, but following a few of them in a textbook has thrown me. eg. 100...

The equation that I have is Vc(t)=Vs(1-e^-t/RC) Where Vc is the voltage across the capacitor Vs is the voltae of the supply Hope this helps.