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Chapter 29: Q. 3 (page 829)

You have two electrically neutral metal cylinders that exert strong attractive forces on each other. You have no other metal objects. Can you determine if both of the cylinders are magnets, or if one is a magnet and the other is just a piece of iron? If so, how? If not, why not?

Short Answer

Expert verified

Turn one of the cylinders, if they repel, therefore both are magnets and if they still attract, therefore, one of them is metal.

Step by step solution

01

Given Information

We need to find if both of the cylinders are magnets, or if one is a magnet and the other is just a piece of iron.

02

Explanation

Check the two cylinders to be magnets, we turn one of the magnets and make the other side of the magnet faces the first one, if they repel, both of they are magnets because similar poles of magnets repel with each other.
In the second case, if they still attract each other even after turning the pole of one of them, So, one of these cylinders is a magnet and the other is just a metal. Because the alignment of the positive and negative charges on the metal depends on the pole of the magnet facing the metal.

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Most popular questions from this chapter

The magnetic field at the center of 1.0cmdiameter loop is 2.5mT.

a. What is the current in the loop?

b. A long straight wire carries the same current you found in part a. At what distance from the wire is the magnetic field2.5mT?

A conducting bar of length l and mass m rests at the left end of the two frictionless rails of length d in FIGURE P29.75. A uniform magnetic field of strength B points upward.

a. In which direction, into or out of the page, will a current through the conducting bar cause the bar to experience a force

to the right?

b. Find an expression for the bar’s speed as it leaves the rails at

the right end.

Point A in FIGURE EX29.15 is 2.0mmfrom the wire. What is the magnetic field strength at point A? You can assume that the wire is very long and that all other wires are too far away to contribute to the magnetic field.

What currents are needed to generate the magnetic field strengths of Table 29.1 at a point1.0cmfrom a long, straight wire?

An electron travels with speed 1.0×107m/sbetween the two parallel charged plates shown in FIGURE. The plates are separated by 1.0cmand are charged by a 200Vbattery. What magnetic field strength and direction will allow the electron to pass between the plates without being deflected?
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