A student uses a magnet to place a picture on the refrigerator door. Which statement explains how the magnet is able to stick to the refrigerator without directly touching it?

Question

options:

Friction acts through the picture and allows the magnet to stick to the refrigerator.
Friction acts through the picture and allows the magnet to stick to the refrigerator.

The force of gravity between the refrigerator and the magnet is strong enough to cause the magnet to stick.
The force of gravity between the refrigerator and the magnet is strong enough to cause the magnet to stick.

The magnet’s magnetic field can act at a distance, and influence the metal of the door through the picture.
The magnet’s magnetic field can act at a distance, and influence the metal of the door through the picture.

The picture’s own magnetic field attracts both the magnet and the refrigerator.
The picture’s own magnetic field attracts both the magnet and the refrigerator.

Answer 1

The correct statement that explains how the magnet is able to stick to the refrigerator without directly touching it is:

The magnet’s magnetic field can act at a distance, and influence the metal of the door through the picture.

This statement correctly describes how magnetic fields work, allowing magnets to attract ferromagnetic materials like the metal in the refrigerator door even when separated by a non-magnetic object (in this case, the picture).

Answer 2

Question
Natasha wants to create her own electromagnet that can pick up small pieces of metal like paper clips or iron fillings. Which list of materials would Natasha need to build her electromagnet?

options:

string, battery, iron nail
string, battery, iron nail

battery, iron nail, wire
battery, iron nail, wire

glass rod, wire, battery
glass rod, wire, battery

Rubberband, string, battery

Answer 3

To create an electromagnet that can pick up small pieces of metal, Natasha would need the following materials:

battery, iron nail, wire

This combination will allow her to create an electromagnet. The battery provides the electrical current, the wire is used to create a coil around the iron nail, and the iron nail serves as the core to enhance the magnetic field when the current flows through the wire.