PHYSICS INVESTIGATORY PROJECT RAHUL KUSHWAHA KV NO.2, NSB, VISAKHAPATNAM KENDRIYA VIDYALAYA NO. 2 NAUSENABAUGH. Investigatory Projects Physics Class 12 Cbse Investigatory Project Selecting Appropriate Instructional [Download pdf] [Read More] Source: medical-site.info Free. this is my investigatory file I made for class XII on the topic electromagnetic induction (EMI).it is in pdf form,docx format can be found here too. Name Abhishek kumar. The magnetic field disappears when the current is turned off.
|Language:||English, Spanish, French|
|Genre:||Fiction & Literature|
|Distribution:||Free* [*Register to download]|
View Physics Investigatory medical-site.info from medical-site.info at Delhi Private School. KENDRIYA VIDYALAYA SANGATHAN BENGALURU REGION BENGALURU. Well, the one and only website, where teachers can help you regarding your Investigatory Project is EduBow. Actually, I needed a solution for the school. Huge List of Physics Investigatory Project Topic, Physics Projects, Science Fair Projects for Physics, Working Models, Astronomy Project Ideas,Physics.
This effect was first observed and explained by Ampere and Faraday between and Faraday discovered that an e. Note that the e. For example, consider two coils as shown in Figure 1. Coil A is connected to a galvanometer and coil B is connected to a battery and has direct current flowing through it. Coil A is within the magnetic field produced by B and an e. This can be done by using the rheostat R, switching the current on or off, or c using an a. Working and Construction: Current is produced in a conductor when it is moved through a magnetic field because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move.
This is called induction because there is no physical connection between the conductor and the magnet.
The current is said to be induced in the conductor by the magnetic field. One requirement for this electromagnetic induction to take place is that the conductor, which is often a piece of wire, must be perpendicular to the magnetic lines of force in order to produce the maximum force on the free electrons.
The direction that the induced current flows is determined by the direction of the lines of force and by the direction the wire is moving in the field.
In the animation above the ammeter the instrument used to measure current indicates when there is current in the conductor. If an AC current is fed through a piece of wire, the electromagnetic field that is produced is constantly growing and shrinking due to the constantly changing current in the wire.
This growing and shrinking magnetic field can induce electrical current in another wire that is held close to the first wire.
The current in the second wire will also be AC and in fact will look very similar to the current flowing in the first wire. It is common to wrap the wire into a coil to concentrate the strength of the magnetic field at the ends of the coil.
Wrapping the coil around an iron bar will further concentrate the magnetic field in the iron bar. The magnetic field will be strongest inside the bar and at its ends poles.
Lenz's Law: As Ep is the instantaneous value of back e. Hence, whatever we gain in voltage, we lose in current in the same ratio.
Similarly it can be shown, that in a step down transformer, whatever we lose in voltage, we gain in current in the same ratio. But in actual practice, there are many power losses; therefore the efficiency of transformer is less than one. Copper loss is the energy loss in the form of heat in the copper coils of a transformer. This is due to joule heating of conducting wires. Iron loss is the energy loss in the form of heat in the iron core of the transformer.
This is due to formation of eddy currents in iron core. Leakage of magnetic flux occurs inspite of best insulations. Faradays Law of Electromagnetic Induction, first observed and published by Michael Faraday in the mid-nineteenth century, describes a very important electro-magnetic concept. Although its mathematical representations are cryptic, the essence of Faradays is not hard to grasp: This concept has many far-reaching ramifications that touch our lives in many ways: We can all appreciate the profound impact Faradays Law has on us.
The principles of electromagnetic induction applied in many devices and systems, including:. Electrical generators Induction motors Induction sealing Inductive charging Transformers Wireless energy transfer.
Do not scratch insulated copper wire while making loop. Do not use digital voltmeter for above demonstration. Flag for inappropriate content. Related titles. Physics Investigatory Project: Common Base Transistor. Amount of Casein in Milk - Chemistry project cbse class CBSE class 12 physics investigatory project on logic gates.
Jump to Page. Search inside document. Around to , Joseph Henry made a similar discovery, but did not publish his findings until later Induced e. The principles of electromagnetic induction applied in many devices and systems, including: Joydeep Naskar. Aayam Rai.
Ayashkant Mishra. Saurav Stark. Rohan Patel. Naveen Doss. Ashar Fatmi. Vikash Prasad.
Pallab Samanta. Dikshant Chand. Atul Singh Arora.
Nilanjana Mishra. Zulfiquar Hadi. Ron the scholar. Narender Singh. Dharma Teja.
Sumit Sapra. This test is used to check the contamination of bacteria in te sample of milk. It tells us about the viable count of Bacteria that may be present in the milk. So by this particular test we can have a clue about the quality of milk we have that whether it is invaded by bacteria or not and in which quantity these are present. A compound microscope is a microscope fitted with two or more convex lenses.
The high magnification produced by these lenses together enables a detailed study of micro-organisms, cells and tissues.
These types of microscopes are therefore widely used in scientific and medical research. Zacharias Janssen, a Dutch spectacle maker, invented the compound microscope in Galileo unveiled his version in Several other scientists and inventors later helped refine its design and working capabilities.
The basic design of a compound light microscope consists of convex lenses fitted at either end of a hollow tube. This tube is fitted on an adjustable, rotary nosepiece. There is an adjustable stage under the nosepiece; specimen slides are placed or fitted on this stage for observation through the lenses. The stage has a window or hole in it through which a light source can illuminate the specimen under observation.
The light source can be a mirror reflecting natural light or a lamp in the base. The illuminating beam passes through the stage window and through the specimen. The light brightens the area around the specimen, making the specimen stand out in contrast. The level of contrast is controlled by controlling the amount of illumination.
A brighter or dimmer effect is achieved by opening or closing an iris diaphragm under the stage, or by adjusting the height of the lamp. Compound microscope The upper lenses of the compound microscope, the ones closer to the viewer's eye, are the ocular lenses or the eyepiece.
Monocular microscopes have one eyepiece, and binocular ones a double eyepiece.