Recent content by zooropa

Homework Statement http://img697.imageshack.us/img697/2317/img11l.jpg (a = 0.10 m and b = 0.16 m) i=3t^3 - 5t (i - ampéres t - seconds) Determine the voltage induced in the coil to the instant t = 3 sec. well as the current direction. Homework Equations Hall efect The...

If i have the new value of R i could find I1 and I2, like this: (xR)I1+(yR)I2=250 and (xR)I1+(yR)I2=500 I think it will be the solution, but the problem is that i can't find the new value of x and y if i combine the 4R and 3R in parallel to get a simpler circuit with only two loops. Any...

I think it will be done with 4R and 3R in parallel. But how can i have the value of the new R?

Homework Statement Taking R = 1.00 kΩ and ε = 250 V in the figure, determine the direction and magnitude of the current in the horizontal wire between a and e. http://img5.imageshack.us/img5/7250/img001nkm.th.jpg Homework Equations Kirchhoff´s law The Attempt at a Solution I must...

Homework Statement The figure represents a section of a circular conductor of nonuniform diameter carrying a current of 5.00 A. The radius of cross-section A1 is 0.400 cm. http://img97.imageshack.us/img97/7220/img01mn.th.jpg Homework Equations (a) What is the magnitude of the...