A student tries to pick up a metal object with a magnet, but the magnet is too far away. What can he change in order to successfully pick up the object? (1 point)

A. Get a larger magnet with a larger magnetic field
B. Rotate the magnet so the center is facing the object
C. Get a smaller magnet with a smaller magnetic field
D. Rotate the magnet so the opposite pole is facing the objecting

5 answers

The correct answer is A. Get a larger magnet with a larger magnetic field.

A larger magnet will generally have a stronger magnetic field, allowing it to attract the metal object from a greater distance.

A student conducts an experiment with a magnet and four objects. He puts the magnet near each of the objects, then observes and records the outcomes. Which question is the student's experiment designed to answer? (1 point)

A. Which objects react to a magnetic force?
B. Can a magnetic force change the shape of an object?
C. Which type of magnet can move an object?
D. How does an object's mass affect its reaction to a magnetic force?

The correct answer is A. Which objects react to a magnetic force?

This question directly aligns with the student's experiment of using a magnet to observe how different objects react in the presence of a magnetic field.

A student made an electromagnet using an iron bolt, copper wire coiled three times around the bolt, and a battery. How can he increase the strength of his magnet? (1 point)

A. Add batteries to decrease the voltage, and increase the space between the coils of wire.
B. Add batteries to increase the voltage, and increase the space between the coils of wire.
C. Add batteries to increase the voltage, and decrease the space between the coils of wire
D. Add batteries to decrease the voltage, and decrease the space between the coils of wire

The correct answer is C. Add batteries to increase the voltage, and decrease the space between the coils of wire.

Increasing the voltage will increase the current flowing through the copper wire, which will strengthen the electromagnet. Additionally, decreasing the space between the coils of wire will increase the density of the magnetic field, further enhancing the strength of the magnet.