ac generator

An AC generator consists of eight turns of wire, each of area .0756 m^2, and a total resistance of 8.38 Ohms. The loop rotates in the external magnetic field of strength .35 T at a constant frequency of 59.7 Hz. What is the maximum induced emf? Units if V What is the maximum induced current? Units of A

inductor

The current in a 48.1 mH inductor changes with time as I = bt^2 - at. With a = 2.7 A/s and b = 3 A/s^2, find the magnitude of the induced emf at t = .992 s. Units of V At what time is the emf zero? Units of s

conducting rod

Consider a rotating conducting rod with length a. It is fixed at the end O and is rotating clockwise with angular frequency, omega. The rotation occurs in a region in which there is a constant, uniform magnetic field perpendicular to the plane of rotation. The magnitude of this field is B. What is the magnitude of the electric field induced in the rod at its midpoint? If b =2.57 T, omega = 1.44 rad/s and a = 2.31 m, what is the magnitude of the emf induced between O and A? Units of V What point has the highest induced potential?

coaxial cable

A coaxial cable consists of a wire of radius 'a' surrounded by a concentric conducting sleeve of inner radius 'b' and outer radius 'c'. A current flows in the wire of radius 'a' out of the page; this current is spread uniformly over the cross section of the wire. An equal current flows in the opposite direction in the sleeve; this current is spread uniformily over the cross section of the sleeve. 1) find the magnetic field in the space between the wire and the sleeve; and also in the space outside the sleeve. (that is , find the mag field at a distance 'r' from the center of the wire when bc ) 2)why is coax cable used in some applications? What are the physical chara... click for more

convex lens

A convex lens of focal length 7.5 cm is placed 12 cm to the left of a convex lens with a focal length of 6.5 cm. An object is placed 10.0 cm to the left of the lens with a focal length of 7.5 cm. Find the location of the image and its character (e.g., real, inverted) (A ray diagram may prove to be helpful also, even if it is just a hand drawn sketch).