In addition to answering the questions below (typed and In essay format), please
ID: 1286524 • Letter: I
Question
In addition to answering the questions below (typed and In essay format), please submit sketches of the magnetic field line produced by a straight wire (section B, 2 points), a loop of wire (section C. 3 points) and a solenoid, compared to a bar magnet (section D. 3 points). 2 points are reserved for ' Haughtier for matters such as clarity, grammar, organization, etc. How is the direction of the current going through a wire related the direction of the magnetic field it produces? If a wire carries current to the North, what direction is the magnetic field directly above it? Directly below it? How do Electromagnets works. How do Electromagnets work? Describe (at least) 2 ways you can make them stronger. Use the solenoid activity (section D) to express your answer, and relate to your magnetic field sketches. Can you easily turn permanent magnets on and off? Electromagnets? Why might it be beneficial to have magnets you can " turn on" and " turn off"?Explanation / Answer
1) Using right hand rule we can say the direction of field when we know the direction of the current. If the thumb is placed in the direction of the current then the direction of closing of fist gives the direction of magnetic field.
Current is to north. Hence the fist is curled in clockwise direction. The field at top will be in east direction and at bottom it will in west direction.
2) Current in one direction produces certain Magnetic Field and the sheath with current in opposite direction produces field opposing the field produced by the Current in the cable.
3) It consists of a length of conductive wire, usually copper, wrapped around a piece of metal. The current flowing through the turns produces magnetic field and its direction through ampere's law can be deduced to be along the Material inside the turns. Thus the direction of magnetic field through the material is like that of a permanent magnet.
The Electromagnet can be made stronger by:
The permanent magnets cannot be just turned On and Off. But we can switch On and Off the Electromagnets.
This is useful because in Electric Motors to control the motion of the motor Electro Magnets are more flexible than the Permanent Magnets.
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