All categories

2 years ago

Electric field creates a 3.9 ma current in a 1.0-mm-diameter wire. what material is the wire made of?

Chemistry

2 answers:

lesya [120]2 years ago

8 0

Thank you for posting you question here. I think the question is incomplete. I manage to check the complete question elsewhere:

A 0.0075 V/m electric field creates a 3.9 mA current in a 1.0 mm diameter wire. What is the wire made of?

<span>a) Aluminum (resistivity: 2.82 * 10 ^ -8) </span>
<span>b) Nichrome (resistivity: 1.1 * 10 ^ -6) </span>
<span>c) Copper (resistivity: 1.68 * 10 ^ -8) </span>
<span>d) Iron (resistivity: 1.0 * 10 ^ -7)
</span>
the answer is B which is Nichrome (resistivity: 1.1 * 10 ^ -6)

Paul [167]2 years ago

8 0

The wire made of Nichrome

<h3><em>Further explanation </em></h3>

The ρ resistivity of an object is the ratio of the magnitude of the electric field to the current density

Can be formulated:

$\large{\boxed{\bold{\rho\:=\:\frac{E}{J} }}}$

Current density (J) itself is the ratio of currents per unit area of cross-section

Can be formulated:

$\large{\boxed{\bold{J\:=\:\frac{I}{A} }}}$

Complete questions from the assignments above can be stated as follows:

A 0.0075 V / m electric field creates a 3.9 mA current in a 1.0 mm diameter wire. What is the wire made of?

a) Aluminum (resistivity: 2.82 * 10 ^ -8)

b) Nichrome (resistivity: 1.1 * 10 ^ -6)

c) Copper (resistivity: 1.68 * 10 ^ -8)

d) Iron (resistivity: 1.0 * 10 ^ -7)

If we see the question above then to find the resistivity of the material we must find the wire cross-section area first

Known value

E = 0.0075 V / m

I = 3.9 mA = 3.9.10⁻³ A

d = 1.0 mm = 1.10⁻³ m

A = 1 / 4 π.d²

A = 1 / 4. π. (10⁻³)²

A = 1/4 . π . 10⁻⁶

so that

$\rho\:=\:\frac{E}{J}$

$\rho\:=\:\frac{E.A}{I}$

$\rho\:=\:\frac{0.0075\frac{10^{-6}}{4} }{3.9.10^{-3}}}$

ρ = 1.5.10⁻⁶ ohm . m

From this value the material which approaches its resistivity is Nichrome with resistivity: 1.1 . 10⁻⁶ ohm.m

<h3><em>Learn more </em></h3>

the flow of electric current.

brainly.com/question/3963792

Electric current

brainly.com/question/1100341

The direction of the magnetic field

brainly.com/question/7947588

An electric current produces a magnetic field.

brainly.com/question/1562277

the direction of the electric field

brainly.com/question/7851834

Keywords: the magnetic field, electric current, resistivity , Nichrome

You might be interested in

Calculate δg o for each reaction using δg of values:(a) h2(g) + i2(s) → 2hi(g) kj (b) mno2(s) + 2co(g) → mn(s) + 2co2(g) kj (c)

steposvetlana [31]

Part (a) :
H₂(g) + I₂(s) → 2 HI(g)
From given table:
G HI = + 1.3 kJ/mol
G H₂ = 0
G I₂ = 0
ΔG = G(products) - G(reactants) = 2 (1.3) = 2.6 kJ/mol

Part (b):
MnO₂(s) + 2 CO(g) → Mn(s) + 2 CO₂(g)
G MnO₂ = - 465.2
G CO = -137.16
G CO₂ = - 394.39
G Mn = 0
ΔG = G(products) - G(reactants) = (1(0) + 2*-394.39) - (-465.2 + 2*-137.16) = - 49.3 kJ/mol

Part (c):
NH₄Cl(s) → NH₃(g) + HCl(g)
ΔG = ΔH - T ΔS
ΔG = (H(products) - H(reactants)) - 298 * (S(products) - S(reactants))
= (-92.31 - 45.94) - (-314.4) - (298 k) * (192.3 + 186.8 - 94.6) J/K
= 176.15 kJ - 84.78 kJ = 91.38 kJ

6 0

2 years ago

Read 2 more answers

What unusual thing can the bull shark do?

kotegsom [21]

Bull sharks have the unique ability of keeping salt in their bodies even freshwater

3 0

3 years ago

Match: Substance ....... Definition Lewis acid A. Provides H+ in water Bronsted-Lowry base B. Provides OH - in water Arrhenius b

Igoryamba

Answer: F. Electron pair acceptor

Explanation:

A Lewis acid can be properly defined as any substance such as H+ (hygrogen ion) that can accept a pair of electron.

While a Lewis base is any substance such as (OH-) that can donate a pair of electron.

In the neutralization reaction between an acid ( H+ ) and a base (OH-). Hydrogen ion (H+ ) is the Lewis acid because it accepts an electron pair from (OH-).

Other examples of Lewis acid are; Mg2+, K+

3 0

2 years ago

An acetylide anion is more stable than either a vinylic or alkyl anion due to Group of answer choices the greater stability of a

sashaice [31]

Answer:

the stabilization of the negative charge in orbitals with higher s character

Explanation:

Acetylide anion is a carbon anion compound or popularly called carbanion. Now Acetylide anion is sp hybridized. However acetylide anion tends to be more acidic as we move from sp³ to sp, hence acidicity increases, which makes sp to have the highest acidity and become the most stable.

So, we can conclude that the acetylide anion is more acidic due to the stabilization of the negative charge in orbitals with higher s character and as the s character increases, acidic nature of acetylide anion also increases.

5 0

2 years ago

PLEASE HELP!<br><br> See picture

Darya [45]

Answer:

See Explanation

Explanation:

The equation of the reaction;

KHSO4(aq) + KOH(aq) -------> K2SO4(aq) + H2O(l)

Number of moles of KHSO4 = 49.6 g/136.169 g/mol = 0.36 moles

Since the reaction is in a mole ratio of 1:1, 0.36 moles of K2SO4 is produced.

Number of moles of KOH = 25.3 g/56.1056 g/mol = 0.45 moles

Since the reaction is 1:1, 0.45 moles of K2SO4 is produced

Hence K2SO4 is the limiting reactant.

Mass of K2SO4 formed = 0.36 moles of K2SO4 * 174.26 g/mol = 62.7 g

So;

1 mole of KHSO4 reacts with 1 mole of KOH

0.36 moles of KHSO4 reacts with 0.36 * 1/1 = 0.36 moles of KOH

Amount of excess KOH = 0.45 moles - 0.36 moles = 0.09 moles

Mass of excess KOH = 0.09 moles * 56.1056 g/mol = 5 g of excess KOH

5 0

2 years ago