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Nana76 [90]
3 years ago
7

The Nichrome wire is replaced by a wire of the same length and diameter, and same mobile electron density but with electron mobi

lity 4 times as large as that of Nichrome. Now what is the electric field inside the wire?
Physics
2 answers:
Fed [463]3 years ago
7 0

Answer:

Explanation:

Usually, the electron drift velocity in a material is directly proportional to the electric field, which means that the electron mobility is a constant (independent of electric field).

μ × E = Vd

Where,

D = electric field

Vd = drift velocity

μ = electron mobility

μ2 = μ × 4

μ/Vd1 = 4 × μ/Vd2

Vd2 = 4 × Vd1

The electric field is the same but drift velocity increases.

Marina CMI [18]3 years ago
6 0

Answer:

The electric field inside the wire will remain the same or constant, while the drift velocity will by a factor of four.

Explanation:

Electron mobility, μ = \frac{v_d}{E}

where

v_d = Drift velocity

E = Electric field

Given that the electric field strength = 1.48 V/m,

Therefore since the electric potential depends on the length of the wire and the attached potential difference, then when the electron mobility is increased 4 times the Electric field E will be the same but the drift velocity will increase four times. That is

4·μ = \frac{4*v_d}{E}

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Anna71 [15]

Answer:

the molecular formula for the gas is NO₂

Explanation:

since it contains

Nitrogen = n → 30.45%

Oxygen = o → 69.55%

and 30.45%+69.55% = 100% , then the gas only contains nitrogen and oxygen

Also we know that the proportion of oxygen over nitrogen  is

proportion of oxygen over nitrogen  = moles of oxygen / moles of nitrogen

since

moles = mass / molecular weight

then for a sample of 100 gr of the unknown gas

mass of oxygen = 69.55%*100 gr = 69.55 gr

mass of Nitrogen = 30.45%*100 gr = 30.45 gr

proportion of oxygen over nitrogen = (mass of oxygen/ molecular weight)/(mass of nitrogen / molecular weight of nitrogen ) =  (69.55 gr/ 16 gr/mol) /( 30.45 gr /14 gr/mol) = 1.998 mol of O/ mol of N≈ 2 mol of O/ mol of N

therefore there are 2 atoms of oxygen per atom of nitrogen

thus the molecular formula for the gas is:

NO₂

6 0
3 years ago
A 12.0 khz, 16.0 v source connected to an inductor produces a 4.00 a current. what is the inductance?
Varvara68 [4.7K]
Inductive reactance (Z) = ω L  =  2Πf L = (2Π) (12,000) (L)

I = V / Z

4 A = 16v / (24,000Π L)

Multiply each side by (24,000 Π L):

96,000 Π L = 16v

Divide each side by  (96,000 Π) :

L = 16 / 96,000Π  =  5.305 x 10⁻⁵ Henry

L = 53.05 microHenry
4 0
3 years ago
Which of the following causes an object to move in a curved path?
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Answer:

A. centripetaal force

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VikaD [51]

Answer:

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Explanation:

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P = m*v

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m = mass [mg]

v = velocity = 8 [m/s]

Now clearing m:

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m = 5 [mg]

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