Why permanent magnets are made up of steels and core of soft iron is made up of soft iron?

1 answer:

7 0

An alternating current passes through the primary coil. The alternating current produces a magnetic field that continuously changes direction. The soft iron core increases the strength of the magnetic field.So the transforemer is made of soft iron core.

Retentivity of soft iron is greater than retentivity of steel

soft iron is more magnetised than steel loses its magnetism more rapidly than steel

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What is the force weight of a jaguar who jumps 3 meters to a tree branch with 2670 J of work?

fgiga [73]

Answer:

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7 0

3 years ago

A Gaussian surface in the form of a hemisphere of radius R = 5.51 cm lies in a uniform electric field of magnitude E = 1.08 N/C.

Ksju [112]

Answer:

$Flux_{base}=-0.0103Nm^2/C$

$Flux_{curvePortion}=-Flux_{base}=0.0103Nm^2/C$

Explanation:

a)At the base of the surface the Electric flux is easy to find, because the Electric Field is constant in magnitude and perpendicular to the flat surface:

$Flux_{base}=-E*S=-E*\pi*R^2=-1.08*\pi*0.0551^2=-0.0103Nm^2/C$

The Flux is negative because the Electric field goes into the surface

b) The Gaussian surface in form of a hemisphere encloses no net charge. The Gauss law says that the Flux of the electric field is proportional to the net charge enclosed. At this case, the charge is zero, then the total Flux is zero too.

$Flux_{total}=Flux_{base}+Flux_{curvePortion}=0$