An arrow and a lens are shown. The distance between the arrow and the lens equals twice the focal length, f, of the lens. Which number is closest to the location of the arrow tip of the image produced by the lens?

The image is located at number 4

Explanation:

As we know that object is located at the position

now for the position of image we can use lens formula as

now we have

now we have

also we know that the magnification is given as

so image will be inverted and its position is 2f

so correct number will be 4

c) up is the direction the magnetic force is acting on the charge.