Assuming the “solenoids” are thick-walled metal cylinders with a hole through the middle, what direction would a steel bead move if placed there and the current turned on? Field lines by convention go from North to South. Are you guessing or do you have a rationale for that answer? Question about strength of magnetic field down coil solenoid. The field is essentially perpendicular to the sides of the path, giving negligible contribution. But I’m really confused as to which way the inner force would point, and how to draw it. Students should be able to explain how a moving-coil microphone works.
This turns out to be a good approximation for the solenoid field, particularly in the case of an iron core solenoid. Steel, on the other hand, is hard to magnetise and demagnetise, and so it retains in magnetism. The most important of the two properties of attraction and repulsion is repulsion. A very interesting homework problem. Step-up transformers are used to increase the potential difference from the power station to the transmission cables then step-down transformers are used to decrease, to a much lower value, the potential difference for domestic use. Students should be able to interpret diagrams of electromagnetic devices in order to explain how they work.
Want to reply to this thread? Students should be able to explain why the National Grid system is an efficient way to transfer energy. Are you guessing or do you have a rationale for that answer? Does that force eventually loop around as well, or does it stay constant?
Physics Solenoids Essay Example for Free – Sample words
See what happens when there is a current in the wire. I just can’t understand your phrasing. Using the right hand rule and knowing it’s a conventional current, I know which way it wraps around. The field is essentially perpendicular to the sides of the path, giving negligible contribution. Students should be able to interpret diagrams of electromagnetic devices in order to explain how they work.
The size of the current flowing through the coil The number of turns in the coil The material inside of the coil Heinmann physics Domains — http: Similar like magnetic poles repel. Attraction and repulsion between two magnetic poles are examples of courzework force.
Students should be able to describe: Solenoid A long straight coil of wire can be coursesork to generate a nearly uniform magnetic field similar to that of a bar magnet.
Just a follow-on comment: A very interesting homework problem.
An induced current generates a magnetic field that opposes the original change, either the movement of the conductor or the change in magnetic field. Homework Help Introductory Physics Homework.
Induced magnetism always causes a force of attraction.
Is there a rule or concept I missed? Microphones use the generator effect to convert the pressure variations in sound waves into variations in current in electrical circuits. Enter data, then click on the quantity you wish to calculate in the active formula above the data entry points.
Solenoids – Physics coursework | Free Essays –
It is used for permanent magnets. A permanent magnet produces its own magnetic field.
Knowledge of laminations and eddy currents in the core is not required. Two like poles repel each other.
Magnetic fields through solenoids
The region around a magnet where a force acts on another magnet or on a magnetic material iron, steel, cobalt and nickel is called the magnetic field. Ckursework the solenoids as existing far away from each other is how I read it. A coil of wire like this is often called a solenoid. Assuming the “solenoids” are thick-walled metal cylinders with a hole through the middle, what direction would a steel bead move if placed there and the current turned on?
Adding an iron core increases the strength of the magnetic field of a solenoid. Electromagnets A magnetic field exists around all wires carrying a current.
The generator effect is used in an alternator to generate ac and in a dynamo to generate dc. Get custom essay sample written according to your requirements Urgent 3h delivery guaranteed Order Now.