Q. A step-up transformer has 260 turns on its primary coil and 90,000 turns on its secondary coil. The EMF of the generator to which the primary circuit is attached is 65.0 V. A. What is the EMF in the secondary circuit? B. The current in the secondary circuit is 0.50 A. What current is in the primary circuit?
Q. A proton moves at a speed of 8.0 103 m/s as it passes through a magnetic field of 0.55 T. Find the radius of the circular path. Note that the charge carried by the proton is equal to that of the electron, but is positive.