magnetism and solenoids Flashcards
What is the relationship between magnetism and electricity in electrical machines?
Electrical machines utilize the interaction between magnetism and electricity.
Define magnetic flux.
Magnetic flux is a measure of the quantity of magnetism, taking into account the strength and extent of the magnetic field.
Define magnetic flux density.
Magnetic flux density describes the concentration of the magnetic field within a specific area.
What is a solenoid?
A solenoid is a tightly wound helix with its length longer than its radius.
How is magnetic flux density related to induced voltage?
A change in flux of one weber per second induces an electromotive force of one volt.
What is the definition of a weber?
The weber is the magnetic flux that links a circuit of one turn, producing an electromotive force of 1 volt if reduced to zero at a uniform rate of 1 second.
What is the SI unit for magnetic flux density?
The SI unit for magnetic flux density is tesla.
What does the formula for magnetic flux density represent?
Magnetic flux density = magnetic flux / area.
Fill in the blank: The magnetic flux density in tesla is a magnetic flux in weber per unit area in _______.
metres.
True or False: The length of a solenoid is shorter than its radius.
False.
What does the symbol ‘V’ represent in the context of magnetic flux?
Voltage.
What does ‘T’ represent in the context of magnetic flux?
Time.
