Hey guys! I have been posting my labs on here for the past few months and you gu
ID: 2075702 • Letter: H
Question
Hey guys!
I have been posting my labs on here for the past few months and you guys have been doing an amazing work. Anyways I am back here with another lab, just like the ones before the first picture is just a summary of what the lab is about, and the pictures that follow are questions about the lab. You do not have to answer every question, I encourage you to skip the questions that you think you cannot do unless you do the experiment, just answer the ones you are confident in and the questions should not be hard or long.
**Note** Please do not write in cursive, I can't read it, thanks and sorry for being picky!
Intro of the lab:
Page 2: slight exerpiemnt with questions (skip the table just attempt the two questions at the bottom of the page)
Page 3: This one is mainly questions, I prefer if you can answer it, but agin skip if too hard.
page 4: read the directions and draw some sort of circuit, hopefully not too hard
page 5:
page 6:
page 7:
I understand these are alot, but I highly encourage you to skip the difficult ones, best of luck and rest assured high rating will be given out!
Names Group Date Lab 8: Induction Contents: I. Introduction ll. Properties of an Electromagnet Ill. Induced Current I. Introduction Pu Ose In this lab you will explore Lenz's Law for induced electric and magnetic fields by investigating the phenomena associated with magnets, currents and coils of wire. You will see how moving a magnet near a coil can produce electrical currents and you will be able to determine experimentally what motions of the magnet produce clockwise (CW) currents and what motions produce counter-clockwise (CCW) currents. You will also find out what motions produce little or no current in the coil. Whenever a conductor moves through a magnetic field in such a manner as to cut across the magnetic flux, an emf is induced in the conductor. The magnitude of the induced emf is directly proportional to the rate of change of flux. Similarly, an induced emf is produced whenever there is a change in the flux threading a coil. In symbols 4t Equipment 2 Gilley Coils Galvanometer Bar magnet Metal Rod 100 kn resistor (anything from 60-120 km will work if needed) Single throw switch Red and Black banana plug wires 2 alligator clips 2 "C" clips 1 red alligator clip wire 1 black alligator clip wire 1 green alligator clip wire Caution: Be sure to keep the magnets away from computers, computer monitors, watches, or any other electronic equipment NEVER CONNECT GALVANOMETER DIRECTLY ACROSS THE BATTERY. IT WILL NOT SURVIVE!!!Explanation / Answer
1. In case of coil we geet circular loops of some metal wire. Lets consider current is flowing through the same which means magnetic lines are produced around the coil. If current is flowing through the coil that means we have battery connection with positive and negative ends. We willl try a bar magnet to both terminals of the battery (remember opposite poles attract law). In the positive terminal of the battery we will see that the south pole is repelled. That means the positive terminal of the battery determines the south pole and negative terminal is north pole.
2. Considering the battery discharge rate, small batteries will wear out quickly and the running time will be less. Moreover, the battery will provide some millamp of current. As our electromagnet is based on the current flow nd running time of the battery ,small runnig time will provide us with weak maagnetic field B.
Page 3:
B.
1) when the switch is open the magnetic energy due to the magnetic field in the coil release as an arc along the switch. Next we insert the metal rod in the coil,which as conductor will increase the effective inductance and total eergy in the coil.
2) Now the switch is closed which means the current will reach its maximum level with energy stored in the coil.Inserting the rod will increase the level of stored energy and also help the current reach its maximum level quickly.
Q1. That means when switch is closed the energy is stored in the coil while opening the switch will release the stored energy in the coil.