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Is you true the magnetic field around an electromagnet can be made stronger by increasing current or decreasing the number of coils around the iron core?
No, you is false. Increasing current does it, but the number of turns in the coilalso must increase if you want to increase the magnetic field that way.
Is the strength of an electromagnet measured in volts?
That's a tricky question. Well, technically it is not measured in volts. The strength of an electromagnet depends on the electrical current which flows through its wires, but not on what drives that current. The current is measured in the amount of charge per unit time that flows through the wires. But when it comes to measuring the magnet, you have to refer to the magnetic field. Without it, there wouldn't be any "magnet." So, logically, to measure the strength of the magnet you must first measure the strength of the magnetic field. It's strength is measured in Volts per meter(V/m). So to measure the strength of the electromagnet you must measure the strength of the magnetic field whose formula is found in the next to last sentence. Hope this helps.
Which of these must be used to create an electromagnet?
coils of wire, iron, and electric current
What relation between electric current and drift velocity?
The relation between electric current and drift velocity is that they both happen to involve electrons moving opposite of the electric field. The electric field must also have a conductor.
Why is an electromagnet only a temporary magnet?
Well this is a simple one to explain. A permanent magnet is a magnet that can not be terminated or "switched off". whilst a temporary magnet can. So i ask you can an electromagnet be turned off. The answer is yes it can though it will have a residual magnetic field for a short period due to residual energy within. I hope this helps I must say that I'm surprised that a teacher did not tell you this during your school life unless you have not reached that part of your school life or you were absent or weren't listening. Nun the less I hope this helps you.
When a magnetic field is used to create an electric current in a wire?
The magnetic field must be changing relative to the conductor (wire). So the wire could move through the field, or the field could move past the wire, or you could have a changing field (from an electromagnet with varying current).
What must pass through a coil in order to make an electromagnet?
An electrical current will cause an electromagnet to energise.
Is you true the magnetic field around an electromagnet can be made stronger by increasing current or decreasing the number of coils around the iron core?
No, you is false. Increasing current does it, but the number of turns in the coilalso must increase if you want to increase the magnetic field that way.
What happen to a electromagnet if you switch the current off?
When we turn of the current in an electromagnet then electromagnet looses its magnetic property,provided the material used inside the current carrying solenoid is soft iron core. If, the material is steel then after the current is turned the magnetism propety still prevails and hence steel becomes a permanent magnet.
Is the strength of an electromagnet measured in volts?
That's a tricky question. Well, technically it is not measured in volts. The strength of an electromagnet depends on the electrical current which flows through its wires, but not on what drives that current. The current is measured in the amount of charge per unit time that flows through the wires. But when it comes to measuring the magnet, you have to refer to the magnetic field. Without it, there wouldn't be any "magnet." So, logically, to measure the strength of the magnet you must first measure the strength of the magnetic field. It's strength is measured in Volts per meter(V/m). So to measure the strength of the electromagnet you must measure the strength of the magnetic field whose formula is found in the next to last sentence. Hope this helps.
Do you have to connect a cell to work an electromagnet?
A cell or other (DC) power source must, indeed, be connected to an electromagnet to make it work. It is an electromagnet. Surf the link to our friends at Wikipedia. It's a good article, and the pics are cool.
Which of these must be used to create an electromagnet?
coils of wire, iron, and electric current
What must be included in an electromagnet?
you should look it up online for your self or ask an adult am i right
True or false an electromagnet must include a coil of wire?
A magnetic field is induced by pushing current though a wire; so you could consider a straight wire an electromagnet. Using more coils will strenghten the electromagnet, though, so a straight wire version will be very weak comparitively.
Must the length exceed the width on a soccer field?
A soccer field must be longer than it is wide.
How can a electromagnet pick up more metal things?
More than what? - An electromagnet can pick up metal due to its magnetism - assuming it is turned on. If you increase the current, the electromagnet becomes more powerful - but you must be careful not to pass too much current, otherwise the wires might burn through.
What relation between electric current and drift velocity?
The relation between electric current and drift velocity is that they both happen to involve electrons moving opposite of the electric field. The electric field must also have a conductor.
