A coaxial cable consists of an inner cylindrical conductor of radius 3 cm on the axis of an outer hollow cylindrical conductor of inner radius 7 cm and outer radius of 10 cm. The inner conductor carries current 4.5 A in one direction, and the outer conductor carries current 8 A in the opposite direction. (a) What is the value of the magnetic field at distances 8 cm and 20 cm from the axis of the cable? (b) Draw how the magnitude of the magnetic field changes with the distance from the axis of the cable.

coil wire, increase current, put iron inside the coil

wavelegth as in spectrum red oygbiv

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.