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Physics: Magnetic Flux Density and Reluctance

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Physics: Magnetic Flux Density and Reluctance

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Questions and Answers

What is the main difference between electric circuit and magnetic circuit?

Electric circuit carries voltage, while magnetic circuit carries current

Electric circuit carries current, while magnetic circuit carries flux (correct)

Electric circuit has resistance, while magnetic circuit has reluctance

Electric circuit has inductance, while magnetic circuit has capacitance

What is the purpose of Ampere's circuital law in magnetic circuits?

To find the magnetic flux density

To determine the reluctance of a magnetic circuit

To measure the permeability of a magnetic material

To calculate the mmf required to establish a certain flux (correct)

What is the unit of magnetic flux density?

Webers (Wb)

Gauss (G)

Ampere-turns (At)

Teslas (T) (correct)

What is the effect of increasing the current in a magnetic circuit?

Increased magnetic flux density Signup and view all the answers

What is the relationship between the fluxes at a junction in a magnetic circuit?

The sum of fluxes entering is equal to the sum leaving Signup and view all the answers

What is the purpose of the reluctance model in magnetic circuits?

To analyze complex magnetic circuits Signup and view all the answers

What is the effect of moving a conductor in a constant magnetic field?

A voltage is induced in the conductor Signup and view all the answers

What is the unit of magnetomotive force (mmf)?

Ampere-turns (At) Signup and view all the answers

What is the relationship between the current and the mmf in a magnetic circuit?

The mmf is proportional to the current Signup and view all the answers

What is the purpose of the B-H curve in magnetic circuits?

To determine the flux density for a given magnetic field strength Signup and view all the answers