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3 years ago

Which metal and which power supply are used to make a permanent magnet,

2 answers:

7 0

Mostly iron is used to make a permanent magnet but also nickel cobalt and some alloys of a rare earth metals. The power supply used to make a permanent magnet is 6 V a.c.

iris [78.8K]3 years ago

6 0

Answer:

all metals

Explanation:

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3 years ago

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3 years ago

What is the period of a wave with a frequency of 100 Hz and a wavelength of 2.0 m

spin [16.1K]

The answer for the following answer is answered below.

Therefore the time period of the wave is 0.01 seconds.
Therefore the option for the answer is "B".

Explanation:

Frequency (f):

The number of waves that pass a fixed place in a given amount of time.

The SI unit of frequency is Hertz (Hz)

Time period (T):

The time taken for one complete cycle of vibration to pass a given point.

The SI unit of time period is seconds (s)

Given:

frequency (f) = 100 Hz

wavelength (λ) = 2.0 m

To calculate:

Time period (T)

We know;

According to the formula;

f = $\frac{1}{T}$

Where,

f represents the frequency

T represents the time period

from the formula;

T = $\frac{1}{f}$

T = $\frac{1}{100}$

T = 0.01 seconds

Therefore the time period of the wave is 0.01 seconds.

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Which metal and which power supply are used to make a permanent magnet,​

Which metal and which power supply are used to make a permanent magnet,