Physics, 20.09.2019 15:30 lucasrandall

How many electrons are necessary to produce 1.0 c of negative charge? (e = 1.60 ã 10-19 c)?

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Answer from: ryanfish6106

$n=6.25\times 10^{18}$

Explanation:

The charge on the electron is given as,

q=-1C

And we know that the formula for charge is,

q=ne

Here, $e=-1.6\times 10^{-19}C$

Therefore,

$n=\frac{-1C}{-1.6\times 10^{-19}C} \\n=0.625\times 10^{19} \\n=6.25\times 10^{18}$

Therefore the number of electron which necessary to produce 1 C of negative charge is $n=6.25\times 10^{18}$ .

Answer from: haylee1468

The number of electrons required for $1\text{C}$ charge is $\boxed{6.25 \times {{10}^{18}}}$ electrons.

Further Explanation:

An electron is considered to be the most basic unit of charge. The amount of charge carried by an electron is the minimum quantized charge. The electrons carry the negative charge whereas the protons carry the same amount of the positive charge.

The charge on an electron is $1.6 \times {10^{ - 19}}\,{\text{C}}$ .

Write the expression for the amount of charge carried by a number of electrons.

$q = n \times e$

Here, is the amount of charge, is the number of electron and is the amount of charge on an electron.

Substitute the value of the amount of charge and the charge on an electron in above expression.

$\begin{aligned}1\text{C}&=n\times(1.6\times10^{-19}\text{C})\\n&=\dfrac{1}{1.6\times10^{-19}}\\&=6.25\times10^{18}\end{aligned}$

Thus, the number of electrons required for $1\text{C}$ charge is $\boxed{6.25\times10^{18}}$ electrons.

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Answer Details:

Grade: High School

Chapter: Electric charge

Subject: Physics

Keywords: Electron, charge, smallest unit, total charge, 1 coulomb, 1.6x10^-19 C, electrons are necessary, negative charge.

Answer from: Quest

The correct answer is c

Answer from: Quest

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

$v_j = v_1 + v_2 = 3.100 + 1.350 = 4.45 m/s$

now the speed of paul will be same as it is given as he is running on the ground

$v_p = 3.100 m/s$

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

$\delta t = \frac{d}{v_j} - \frac{d}{v_p}$

$\delta t = \frac{2080}{4.450} - \frac{2080}{3.100}$

$\delta t = -203.55 s$

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

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