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3 years ago

What is true about semiconductors?

Physics

1 answer:

Iteru [2.4K]3 years ago

3 0

In semiconductors, you can change how easily electrons move through them. That is option 2.

<h3>What are semiconductors?</h3><h3 />

Semiconductors is defined as those substances that possess the characteristics of both metal and non metal.

Examples of semiconductors include the silicon, germanium, and gallium arsenide elements.

The semiconductors are able to conduct electricity through the presence of electrons and holes in them.

The movement of these electrons can be controlled through the addition of impurities to the semiconductor material.

Therefore, in semiconductors, you can change how easily electrons move through them.

Learn more about semiconductors here:

brainly.com/question/1918629

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A cylindrical specimen of some metal alloy having an elastic modulus of 102 GPa and an original cross-sectional diameter of 3.8

dolphi86 [110]

Answer:

$l=222.803mm$

Explanation:

Given:

Elastic modulus, E = 102 GPa

Diameter, d = 3.8mm = 0.0038 m

Applied tensile load = 2440N

Maximum allowable elongation, = 0.47mm = 0.00047

Now,

The cross-sectional area of the specimen, $A_o=\frac{\pi d^2}{4}$

substituting the values in the above equation we get

$A_o=\frac{\pi 0.0038^2}{4}$

$A_o=1.134\times 10^{-5}$

now

the stress (σ) is given as:

$\sigma=\frac{Force}{Area}$

and $E=\frac{\sigma}{\epsilon}$

where,

$\epsilon =\ Strain$

also,

$\epsilon=\frac{\Delta l}{l}$

where,

$l=initial \ length$

thus,

$E=\frac{\frac{F}{A_o}}{\frac{\Delta l}{l}}$

or on rearranging we get,

$l=\frac{E\times \Delta l\times A}{F}$

substituting the values in the above equation we get

$l=\frac{102\times 10^9\times 0.00047\times 1.134\times 10^{-5}}{2440}$

$l=0.222803m$

$l=222.803mm$

5 0

4 years ago

Two charged particles exert an electric force of 27 N on each other. What will the magnitude of the force be if the distance bet

Elena-2011 [213]

Answer:

243 N

Explanation:

The formula for electromagnetic force is F= Kq1q2/r^2

where r is the distance between the charges, if the distance between the charges is reduced by 1/3 then F will increase by 9 [(1/3r)^2 becomes 1/9r which is 9F] so 27*9 is 243N

4 0

3 years ago

How did planck find the correct curve for the specturm of light emitted by a hot obkect?

Neko [114]

Planck find the correct curve for the specturm of light emitted by a hot object by vibrational energies of the atomic resonators were quantized.

<h3>Briefing :</h3>

The energy density of a black body between λ and λ + dλ is the energy E=hc/λ of a mode times the density of states for photons, times the probability that the mode is occupied.
This is Planck's renowned equation for a black body's energy density.
According to this, electromagnetic radiation from heated bodies emits in discrete energy units or quanta, the size of which depends on a fundamental physical constant (Planck's constant). The basis of infrared imaging is the correlation between spectral emissivity, temperature, and radiant energy, which is made possible by Planck's equation.

Learn more about the Planck's constant with the help of the given link:

brainly.com/question/27389304

#SPJ4

3 0

1 year ago

Which force causes acceleration(gravity)(friction)(velocity )(energy)

icang [17]

Velocity causes acceleration

Please vote brainliest!

8 0

4 years ago

Read 2 more answers

Describe how earth distance from the sun changes throughout the year when is earth closest to the sun

yaroslaw [1]

The father earth is away from the sun the more cold.
The closer the sun gets the more hot.
When going threw these motions our seasons and days change as the earth moves around the sun while rotating. Hope this helped.

4 0

3 years ago