PHYS 103 Chapter Notes - Chapter 3: Electromagnet, Paper Clip

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9 Jan 2023

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When the battery was connected, and the cord was laid on top of the compass the needle went directly from north to south. Here the coil is wrapped around the wire 100 times and the ends have been sanded to allow the magnetic flow. Here the magnet is connected with the nail, and the needle of the compass turns directly to the side of the north end of the nail. This is where i determined the north end of the needle. In this picture i used the electromagnet to pick up paper clips. After moving the wire around and wrapping it around the clip a few times i was able to pick up three paper clips. After the clip was disconnected it could still pick up a paperclip. Next, i added two batteries, but was only able to pick up one paperclip.

Related Questions

A small compass is held horizontally, the center of its needleadistance of 0.270 m directly north ofa long wire that isperpendicular to the earth's surface. Whenthere is no current inthe wire, the compass needle points duenorth, which is thedirection of the horizontal component of theearth's magnetic fieldat that location. This component is parallelto the earth's surface.When the current in the wire is26.3 A, the needle points 22.9Â° eastof north.

(a) Does the current in the wire flow towardoraway from the earth's surface?

toward the Earth's surfaceaway from theEarth'ssurface

(b) What is the magnitude of the horizontal component of theearth'smagnetic field at the location of the compass?
2

One way to make a compass is to stick a magnetized needle into a piece of cork and float it in a glass bowl full of water. The needle will align itself with the horizontal component of the Earth's magnetic field. Since the north pole of this compass is attracted northward, will the needle float toward the north side of the bowl? Defend your answer.

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1. A student has mapped out a few magnetic field lines using a compass, as shown in the figure.

Rank points C, D, and E according to the magnitude of the magnetic field at those locations, from greatest to least (for example, if there were points P, Q and R, and the field at P and R were the same and both were greater than the field at Q, you would write "P = R > Q").

2. The student then places the compass at point C. Which of the following best represents the orientation of the compass needle?

3. The student then moves the compass to point D. Which of the following best represents the orientation of the compass needle?

4. The student then places the compass inside a hollowed-out magnet as shown.

Which of the following best represents the orientation of the compass needle?

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PHYS 103 Chapter Notes - Chapter 3: Electromagnet, Paper Clip

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