8. A uniform magnetic field is directed perpendicular to the xy-plane. A 4.0-m length of conducting wire is to be formed into a two-dimensional shape and then placed in the xy-plane. Which shape would experience the greatest magnetic flux through it?

A a circle
B a rectangle, its length four times its width
C a square
D a rectangle, its length twice its width

An electric current is flowing through the cord below. what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s. what is the wavelength?