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3 years ago

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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Ammonia enters the compressor of an industrial refrigeration plant at 2 bar, −10°C with a mass flow rate of 15 kg/min and is com

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Answer:

a) W=85.225 kW

b) $0.02\frac{kW}{K}$

Explanation:

First, consider the energy balance for the compressor: The energy that enters to the system (W and enthalpy of the feed flow) is equal to the energy that goes out from it (Heat Q and enthalpy of the exit flow):

$W+m*h_1=Q+m*h_2\\W=Q+m*(h_2-h_1)$

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So, the power input to the compressor is:

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3 years ago

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

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