Magnetic Field Lab

1. Move the compass slowly along a semicircular path above the bar magnet until you’ve put it on the opposite side of the bar magnet. Describe what happens to the compass needle.

The purpose of this experiment is to discover if a magnet physically turns or if the magnetic field weakens to allow the North and South poles to flip.

The amount of heat required to raise the temperature of a solid body depends on its change in temperature (ΔT), its mass (m), and an intrinsic characteristic of the material forming the body called specific heat (cp). The heat is calculated from the equation

A long tail like you would see on a comet. Near Earth, however, the lines stay very close to the “dipole pattern” of a bar magnet, that named because of its two poles. To Faraday, field lines were mostly a way of showing the structure of the magnetic force. In space research though, they have a much bigger significance, because electrons and ions tend to stay attached to them, like beads on a string, even becoming trapped when conditions are right. Because of this attachment, they define an “easy direction” in the rarefied gas of space, like the grain in a piece of wood, a direction in which ions and electrons, as well as electric currents can easily move. In contrast, motion from one line to another is harder. A map of the magnetic field lines of the magnetosphere tells, at first look, how different regions are linked and many other important properties. Faraday not only viewed the space around a magnet as filled with field lines, but also developed an intuitive notion that such space was itself modified, even if it was a complete vacuum. His younger contemporary, a Scottish physicist named James Clerk Maxwell placed this notion on a firm mathematical footing, including in it electrical forces as well as magnetic ones. A modified area like this is now known as an electromagnetic field. Today electromagnetic fields are a very

What are the specific stages of iron deficiency and how do they relate to anemia development?

In lab we used a metal compass to measure and to find our two-point threshold acuity. When Dario was measuring my two-point sensitivity, I was blindfolded and had to judge whether or not I felt one-point or two-points. We tested these on multiple locations being, the pad of my index finger, pinky and thumb. We also measured our two-point sensitivity on the center of my palm, back of my hand and the top and bottom of my forearm. We took these measurements by starting the metal compass at 1mm for each location. The experimenter would incrementally increase the metal compass after each trial until the participant said they felt two points. The experimenter would then verify that measurement and would repeat the measurement once again for accuracy. My results for my two-point threshold sensitivity can be found on the table above. However, we found that the pads of my fingertips had the greatest number of receptive field. This didn’t surprise me because it makes sense to have a greater number of receptive fields in areas that are most predominantly used for touch. Something that did surprise me though was how few of receptive fields I had on my palm, back of my hand and on the top and bottom of my forearms. It makes sense that I’d have fewer receptive fields in this area because I don’t use this for touch usually but how few of receptive fields I had in these areas really surprised me. These measurements tell us that the number of receptive fields are predominantly

Firstly and most importantly, it is about the underlying idea of how magnetism and electricity have come about, also it outlines and maps out the development and discoveries of sources of electricity and magnetism by many inventors and the latter discoveries of mega-production.

The cross body in Campina was comprised mainly of iron, following MS-011501-11, which is a ferromagnetic material, meaning it is strongly magnetic and therefore became quickly saturated by the magnetic field of the lifting magnet (http://www.doitpoms.ac.uk/tlplib/ferromagnetic/printall.php). Depictions of the cross’s magnetic moments with and without the influence of the lifting magnet are shown below, with the moments or domains represented by the vector arrows.

Aim: The aim of the experiment is to investigate what affects the strength of an electromagnet.

Previously scientists believed magnetism and electricity were two separate forces but in 1820 Hans Christian Orsted observed that when he turned on a battery that had electric current flowing a compass needle moves away from north. This experiment showed him that electric current flowing through a wire produces a magnetic field. The direction of a magnetic field depends on the direction of the electric current and in a similar way a change in a magnetic field

The strength of the electromagnet depended on the amount of volts used. This project gave me the chance to go where as one of the finalists at my school.

The magnetic field of a permanent magnet causes the atoms to move around uniformly in the same direction. This may vary depending on the electrons of the atoms causing a variety of atoms to be able to do this and few which can hold a permanent magnetic field. It is an invisible field and it is also called a vector because of the forces specified direction and magnitude. The arrow displays the direction of the force and also how the forces are. The closer the lines are together it shows how much stronger it is also the further away they are it shows how much weaker they are.

(g) The steps (c) and (d) were repeated to obtain new values of Ŝe and then step (e) to obtain a new curve III.

Orsted was dumbfounded about his discovery, but had no way of explaining how it was possible that the electrical current had an effect on the magnetic needle of the compass. After reading about Orsted’s results, a man by the name of André-Marie Ampère sought to find the reason for this occurrence and what he discovered changed the field of electrical engineering forever. “He demonstrated that when two wires were placed parallel to one another, both carrying an electric current, they'd either be attracted to or repulsed by each other depending on which directions the currents were traveling.” [4]. Ampere later created what is known as Ampere’s Law which relates electricity and magnetism.

The objective of the experiment was to understand the North and South poles of a magnet and how they relate to each other for a single magnet and two magnets when like poles or unlike poles are placed together. The results of the experiments verified the properties of magnets with respect to how like poles repel and how unlike poles attract. Also, electromagnets were created and investigations confirmed Lenz’s law. The experiment produced results that agreed with expectations, confirming the behavior of like poles, unlike poles, electromagnets and Lenz’s law. A Magnetic Field Sensor was used to measure the magnetic field due to the current flowing in the coil and showed a steady magnetic field relative to time.