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babymother [125]
3 years ago
7

Two plates of area 7.00 × 10-3 m2 are separated by a distance of 2.60 × 10-4 m. If a charge of 5.40 × 10-8 C is moved from one p

late to the other, calculate the potential difference (voltage) between the two plates. Assume that the separation distance is small in comparison to the diameter of the plates.
Physics
1 answer:
lesantik [10]3 years ago
6 0

Answer:

226.53 Volt

Explanation:

A = Area of plates = 7.00×10⁻³ m²

ε₀ = Permittivity of space = 8.854×10⁻¹² F/m

d = Distance between two plates = 2.60×10⁻⁴ m

Q = Charge = 5.40×10⁻⁸ C

Capacitance

C=\frac{\epsilon_0A}{d}\\\Rightarrow C=\frac{8.854\times 10^{-12}\times 7\times 10^{-3}}{2.6\times 10^{-4}}\\\Rightarrow C=23.83\times 10^{-11}

Potential difference between plates

V=\frac{Q}{C}\\\Rightarrow V=\frac{5.4\times 10^{-8}}{23.83\times 10^{-11}}\\\Rightarrow V=226.53\ Volt

∴ The potential difference (voltage) between the two plates is 226.53 Volt

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Answer:

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6 0
2 years ago
Where is the near point of an eye for which a contact lens with a power of +2.55 diopters is prescribed?Where is the far point o
tankabanditka [31]

Answer:

(a). The eye's near point is 68.98 cm from the eye.

(b). The eye's far point is 33.33 cm from the eye.

Explanation:

Given that,

Power = 2.55 D

Object distance = 25 cm for near point

Object distance = ∞ for far point

Suppose where is the far point of an eye for which a contact lens with a power of -3.00 D  is prescribed for distant vision?

(a) We need to calculate the focal length

Using formula of power

f =\dfrac{1}{P}

Put the value into the formula

f=\dfrac{100}{2.55}

f=39.21\ cm

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Using formula of lens

\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}

Put the value into the formula

\dfrac{1}{39.21}=\dfrac{1}{v}-\dfrac{1}{-25}

\dfrac{1}{39.21}-\dfrac{1}{25}=\dfrac{1}{v}

\dfrac{1}{v}=-\dfrac{1421}{98025}

v=-68.98\ cm

The eye's near point is 68.98 cm from the eye.

(b). We need to calculate the focal length

Using formula of power

f =\dfrac{1}{P}

Put the value into the formula

f=-\dfrac{100}{3.00}

f=-33.33\ cm

We need to calculate the image distance

Using formula of lens

\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}

Put the value into the formula

\dfrac{1}{-33.33}=\dfrac{1}{v}-\dfrac{1}{\infty}

-\dfrac{1}{33.33}+\dfrac{1}{\infty}=\dfrac{1}{v}

\dfrac{1}{v}=-\dfrac{1}{33.33}

v=-33.33\ cm

The eye's far point is 33.33 cm from the eye.

Hence, (a). The eye's near point is 68.98 cm from the eye.

(b). The eye's far point is 33.33 cm from the eye.

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3 years ago
C. is what percent of 125?​
solmaris [256]

Answer:

Step 1: We make the assumption that 125 is 100% since it is our output value.

Step 2: We next represent the value we seek with $x$.

Step 3: From step 1, it follows that $100\%=125$.

Step 4: In the same vein, $x\%=125$.

Step 5: This gives us a pair of simple equations:

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Explanation:

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Which of the following statements are true concerning electromagnetic radiation fields?Select all that apply.a.) The electric an
ale4655 [162]

Answer:

a.) The electric and magnetic fields are in phase with each other as they propagate through space.

Explanation:

Electromagnetic wave is a transverse wave in which magnetic field and electric field both induces each other as both changes with time

Here magnetic field induces electric field and similarly magnetic field induces electric field.

As we know that this is a transverse wave so here magnetic field and electric field lies in perpendicular planes. but they both propagate in same direction in such a wave that both fields reaches their maximum position and minimum positions simultaneously

So the correct answer is

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3 years ago
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padilas [110]

Answer:

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Explanation:

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Using formula of speed of the transverse waves

v=\sqrt{\dfrac{T}{\mu}}

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Hence, The speed of transverse waves in this string is 519.61 m/s.

6 0
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