A student takes a strand of copper wire and forms it into a circular loop of circumference of 0.395 m. The student then places the loop in a uniform, constant magnetic field of magnitude 0.00303 T that is oriented perpendicular to the face of the loop. Pulling on the ends of the wire, they reduce the circumference of the loop to 0.127 m in a time interval of 0.652 s. Assuming that the loop remains circular as it shrinks, what is the magnitude of the average emf  induced around the loop during this time interval?

What will a positive and a negative charge do if they are separated from each other?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.