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3 years ago

12

A 0.20-f capacitor is desired. what area must the plates have if they are to be separated by a 3.2-mm air gap?

2 answers:

Igoryamba3 years ago

5 0

Air gap means that the dielectric is air.

So <span>ε0 = </span><span>8.85 x 10^-12 [F/m].......................permitivity of free space

Lets use the equation

</span>C= ( ε0x A) / d

Where A is the area of the plate

And d the distance between the plates

d = <span>3.2-mm = 3.2 E-3 m

so ............> A = C *d /</span>ε0 = 0.20 F * 3.2 E-3 m / 8.85 x 10^-12 [F/m]

A = 7.23 E 7 [m2]

dalvyx [7]3 years ago

3 0

<span>Capacity = 0.20 F Distance d = 3.2 x 10^-3 m We know the vacuum permittivity e0 = 8.854Ă—10^-12 We have the equation, C = e0A / d => A = Cd / e0 A = (0.20 x 3.2 x 10^-3) / 8.854Ă—10^-12 = 0.64 x 10^9 / 8.854 = 0.07228 x 10^9 Area of the plates A = 7.228 x 10^7</span>

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3 years ago

A metal wire 1.50 m long has a circular cross section of radius 0.32 mm and an end-to-end resistance of 90.0 Ohms. The metal wir

elixir [45]

Answer:

So after stretching new resistance will be 0.1823 ohm

Explanation:

We have given initially length of the wire $l_1=150m$

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Resistance of the wire initially $R_1=90ohm$

We know that resistance is equal to $R=\frac{\rho l}{A}$ ,here $\rho$ is resistivity, l is length and A is area

From the relation we can say that $\frac{R_1}{R_2}=\frac{l_1}{l_2}\times \frac{A_2}{A_1}$

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3 years ago

3. Same questions as the previous problem, but for mass m just falling 3 meters in a vacuum: (a) How long does it take mass m to

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Answer:

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3 years ago

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3 years ago

Read 2 more answers

according to newton's third law, of a sledgehammer hits a wall with a force of 1000 n, how much force does the wall hit the sled

astra-53 [7]

The correct option is A: the force exerted on the wall by the sledgehammer is - 1000 N

<h3>Newton's third law</h3>

Newton's third law of motion states that for every action or force, there is an equal but oppositely directed force.

<h3>Application of the newton's third law</h3>

Force with which the sledgehammer hits the wall = 1000 N

From the Newton's third law, an equal but oppositely directed force is exerted on the sledgehammer by the wall.

Thus, the force exerted by the sledgehammer on the wall = -1000 N

The negative sign indicates that the force acts in a direction opposite to that of the sledgehammer.

Thus, the correct option is A: the force exerted on the wall by the sledgehammer is - 1000 N

Learn more about Newton's third law and force at: brainly.com/question/13874955

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3 years ago