Recent content by Angie K.

Homework Statement If 39.4 kW of power is to be transmitted from a generating station over two 0.141-Ω lines, estimate how much power is saved if the voltage is stepped up from 120 V(rms) to 1200 V(rms) and then down again, rather than simply transmitting at 120 V. Assume the transformers are...

That did not work. This is so frustrating.

Yes it is unlimited attempts.

Ah, so the Force is just ILB sin 90 which is ILB because sin90 is 1

For current going into the page the field goes to the right and the for current out of the page the field is to the left. Is sin 60 the wrong angle ? Would it be 30?

It is an equilateral triangle so each angle is 60.

It is an online homework assignment so I don't know the answer until I get the right solution.

(8.96E3kg)/m3(Π*.001883m)*L=m .094267kg/m*L=m Fg=mg Fg = (.094267kg/m*L)(9.80m/s)= .9238kg/s*L FB = I*L*B which = Fg magnetic field, B = 2Πx10-7(2.08/.0571) sin 60 = 4.1610*10-5kg/A*s So now FB=Fg .9238kg*L = I*L(4.1610*10-5kg/A*s) I = 22201.4 A which is a big number, and also wrong so...

Got it. Thank you very much

So I have B when r is a little less than L and when it is a little more than L. Now do I just add the two magnetic fields?

Would the x be half the diameter of the wire?

The field lines are going to the left on both wires. so I'm confused what direction they would be at point P

Would L be L+r and L-r? Where r is .095m ?

Wouldn't the field be going the same way from both wires? Then what would the x and y look like if the field is just one on top of the other going the same way?

Homework Statement A long pair of wires serves to conduct I = 25.2 A of dc current to and from an instrument. If the wires are of negligible diameter but are d = 2.92 mm apart, what is the magnitude |B| of the magnetic field a distance L = 9.5 cm from their midpoint, in their plane? What...