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3 years ago

Anna will wear a black dress when she attends her cousin’s wedding. Which color(s) does the dress absorb?

2 answers:

6 0

As the dress is black it will absorb all colors with all different wavelengths

In short, Your Answer would be Option A

Hope this helps!

weqwewe [10]3 years ago

3 0

it should be all colors

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Consider a system to be two train cars traveling toward each other. What is the total momentum of the system before the train ca

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Let say the two train cars are of masses $m_1$ and $m_2$

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3 years ago

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Julie's psychologist helped her get over her fear of spiders. Which goal of psychology has the phycologist met ?

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What is the displacement current in the capacitor if the potential difference across the capacitor is increasing at 500,000V/s?

konstantin123 [22]

Answer:

$I=2.71\times 10^{-5}\ A$

Explanation:

A 6.0-cm-diameter parallel-plate capacitor has a 0.46 mm gap.

What is the displacement current in the capacitor if the potential difference across the capacitor is increasing at 500,000V/s?

Let given is,

The diameter of a parallel plate capacitor is 6 cm or 0.06 m

Separation between plates, d = 0.046 mm

The potential difference across the capacitor is increasing at 500,000 V/s

We need to find the displacement current in the capacitor. Capacitance for parallel plate capacitor is given by :

$C=\dfrac{A\epsilon_o}{d}\\\\C=\dfrac{\pi r^2\epsilon_o}{d}$ , r is radius

Let I is the displacement current. It is given by :

$I=C\dfrac{dV}{dt}$

Here, $\dfrac{dV}{dt}$ is rate of increasing potential difference

$I=\dfrac{\pi r^2\epsilon_o}{d}\times \dfrac{dV}{dt}\\\\I=\dfrac{\pi (0.03)^2\times 8.85\times 10^{-12}}{0.46\times 10^{-3}}\times 500000\\\\I=2.71\times 10^{-5}\ A$

So, the value of displacement current is $2.71\times 10^{-5}\ A$ .

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