How does an electric motor use magnetic force to produce motion? a. the north pole of a permanent magnet placed in the center of an electromagnet attracts the north pole of the electromagnet. b. the north pole of an electromagnet placed in the center of a permanent magnet attracts the north pole of the permanent magnet. c. the north pole of a permanent magnet placed in the center of an electromagnet repels the north pole of the electromagnet. d. the north pole of an electromagnet placed in the center of a permanent magnet repels the north pole of the permanent magnet.

Answer

Correct Answer is D( The north pole of an electromagnet placed in the center of a permanent magnet repels the north pole of the permanent magnet.)

Explanation:

An electric motor is a device which is used to convert electrical energy into mechanical energy. The working of electric motors is based on the interaction between magnetic field linked with motors and winding currents.This interaction generate a force which produce motion.In electric motors north pole of an electromagnet placed in the center of a permanent magnet which repels the north pole of the permanent magnet due to which motion is produced.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .