MAGNETISM AND ELECTROMAGNETISM QUIZ

reversed in polarity

decreased

zero

increased

25 AT/m

2500 AT/m

0.25 AT/m

250 AT/m

Brass

Aluminium

Soft iron

Copper

4 AT

16 AT

8 AT

10 AT

Core length increases

Flux density increases

Core area increases

Flux density decreases

the magnetic field will not be affected

the magnetic lines of force will bend away from their usual paths in order to go away from the piece

the iron piece will break

the magnetic lines of force will bend away from their usual paths in order to pass through the piece

Does not vary with increasing cross-sectional area of material

Any of the listed here

Increases with increasing cross-sec-tional area of material

Decreases with increasing cross sectional area of material

1 mWb/m²

1 Wb/m

1 Wb/mm²

1 Wb/m²

spin of nucleus

orbital motion of electrons

spin of electrons

either of these

At/m

Wb/At × m

At/Wb

Wb