Magnetic Fields Worksheet

Front

Using the picture of iron filings on a bar magnet, what evidence best supports the claim that magnetic fields are not the same across the magnet?

Back

The magnetic fields of the magnet are strongest at both poles.

Front

A student wraps a current-carrying wire around an iron rod and places the north pole of a bar magnet near the top of the rod. The magnet moves away from the rod. What field exists between the rod and the magnet?

Back

The current in the wire has created a magnetic field with its north pole at the top of the rod.

Front

In which of the following diagrams would the gravitational attraction be the greatest?

Back

(Diagram showing two 10 kg masses)

Front

What happens to the electrons when a negatively charged rod touches a foam cup in an experiment involving an aluminum can on top of the foam cup?

Back

The electrons will pass to the foam cup but will remain in a localized, negatively charged area on the cup where the rod was placed.

Front

The pictures show four electrically charged items. Select all of the items a glass rod would attract if it were rubbed with a silk cloth, giving it a positive charge.

Back

plastic sheet 1

Balloon 2

Front

A student rubs a rubber rod with fur, producing a negative charge on the rod. The student then touches the rod to a hollow, neutral metal sphere on an insulating plastic stand. What happens to the charge, and why?

Back

It will distribute itself evenly over the surface of the sphere, because like charges repel and the sphere is a conductor.

Front

A student creates an electromagnet and holds it near two paper clips. Paper clip Y is not attracted to the magnet. Which step should the student take to attract it?

Back

The student should move the magnet closer to the paper clip.

Front

What do the student's observations of the horseshoe magnet and electromagnet demonstrate? Observations: - 20 cm: no force required - 10 cm: small force required; easy to hold in place - 5 cm: large force required; very difficult to hold in place.

Back

The electromagnet's magnetic field is stronger close to it than far from it.

Front

Which question can be answered based on the results of Experiment 2?

Back

How does the strength of an electromagnet vary when the number of paper clips changes?

Front

Predict what will happen when a stronger magnet weighing 2.00 ounces is placed on a scale and the same paperclip is suspended above it.

Back

The scale will read less than 1.63 ounces because the paperclip will exert an even greater upward force on the magnet.