Select the correct answer.

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity?

A. alternating

B. direct

C.

straight

D.

alternating and direct

A. alternating current

Explanation:

An alternating current is that which changes polarity in a periodic manner. It is generated when a conductor cuts or breaks magnetic field lines in such  a way that it periodically alternates or switches its direction of motion or position between the north and south poles of the magnetic field.

The switching of the direction of motion makes the polarity of the induced current to change in a manner that corresponds to the motion of the conductor. This is what generates an alternation current (a.c)

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 .