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2 years ago

Which of the following characteristics are displayed by hard magnetic materials?

Physics

1 answer:

irakobra [83]2 years ago

4 0

Answer:

Characteristics are displayed by hard magnetic materials:

B. relatively large hysteresis loop.

D. Magnetization and demagnetization require relatively high applied fields.

<u>Explanation</u>:

They are otherwise called as the permanent magnets, they have the ability to retain is quality even after being magnetised. They have the ability of greater hysteresis loop, it is the relation between the induced magnetic flux to that of magnetizing force. When it is high gives the hard magnetic material. They have high retentivity and coercivity. This means the driving field during magnetization is null. To get coercivity the driving field should be made in the opposite direction.

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2 years ago

A cyclist rides 16.0 km east, then 8.0 km west, then 8.0 km east, then 32.0 km west, and finally 11.2 km east.

Anna71 [15]

Answer:

Time, t = 12 minutes

Explanation:

It is given that,

A cyclist rides 16.0 km east, then 8.0 km west, then 8.0 km east, then 32.0 km west, and finally 11.2 km east. Let west direction is negative and east direction is positive. The displacement of the cyclist is :

$d=16-8+8-32+11.2=-4.8\ km$

d = 4800 m

Let us assumed that the average speed of the cyclist is, v = 24 km/h = 6.66667 m/s

Let t is the time taken by the cyclist to complete the trip. The velocity of an object is given by :

$v=\dfrac{d}{t}$

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$t=\dfrac{4800\ m}{6.66667\ m/s}$

t = 719.99 seconds

t = 720 seconds

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3 years ago

The resistance created by waves on a 120-m-long ship is tested in a channel using a model that is 4 m long Y Part A If the ship

DanielleElmas [232]

Answer:

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