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saul85 [17]
2 years ago
7

Why must you emove magnet slowly from alternating current

Physics
1 answer:
Zanzabum2 years ago
7 0

Alternating current changes the orientation of the electromagnetic field by rapidly switching directions, helps to demagnetization.

<h3 /><h3>What is the process of Demagnetization by AC current?</h3>

Alternating current changes the orientation of the electromagnetic field by rapidly switching directions.

Because providing an electrical field (electromagnet) is one technique to create a magnet, it stands to reason that you can use alternating current to remove magnetism as well.

To do this, an alternating current (AC) current is sent through a solenoid. Begin with a greater current and gradually lower it until it is zero.

The magnetic dipoles strive to position themselves according to the field, but because it changes, they become randomized. Due to hysteresis, the material's core may retain a modest magnetic field.

Hence, alternating current changes the orientation of the electromagnetic field by rapidly switching directions, helps to demagnetization.

To learn more about demagnetization, refer:

brainly.com/question/9700067

#SPJ4

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Calculate the frequency of visible light having a wavelength of 410 nm
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Given: Wavelength λ = 410 nm  convert to Meters m = 4.10 x 10⁻⁷ m

Speed of light c = 3 x 10⁸ m/s

Required: Frequency  f = ?

Formula: c = λf 

               f = c/λ

               f = 3 x 10⁸ m/s/4.10 x 10⁻⁷ m

               f = 7.32 x 10¹⁴/s  or 732 Thz (Terahertz)
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20. A semiconductor is a
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D. crystalline solid that conducts current under certain conditions

Explanation:

Semiconductors are crystalline solids that has the ability to conduct electrical currents but on certain conditions e.g heat. The conduction of semiconductors is less than that of conductors (metals) but more than insulators (nonmetals), hence, they are said to be intermediates of conductors and insulators in terms of electrical conductivity.

Examples of semiconductors are silicon, boron, carbon, germanium, arsenic etc.

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alukav5142 [94]

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2 years ago
A 45-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is 1.1 m/s. Neglect air resistan
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The altitude or height of the pole vaulter as she crosses the bar is 4.04 m.

<h3>What is the height of the pole vaulter?</h3>

The height of the pole vaulter is determined from the change in kinetic energy which is equal to the potential energy at that height.

  • Potential energy = Change in kinetic energy
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h = (v - u)²/2g

h = (10 - 1.1)²/2 * 9.8

h = 4.04 m.

In conclusion, the height is determined from the potential energy at that height.

Learn  more about potential energy at: brainly.com/question/14427111

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The answer is vibrate

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