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Natasha_Volkova [10]
3 years ago
12

hooke's law is described mathematically using the formula fsp=-kx. which statement is correct about spring force, fsp? A. It is

always a positive force B. It is larger than the applied force C. It is the force doing the push or pull D. It is a vector quantity
Physics
1 answer:
bogdanovich [222]3 years ago
6 0

Answer:

A. It is always a positive force

Explanation:

Hooke's law describes the relation between an applied force and extension ability of an elastic material. The law states that provided the elastic limit, e, of a material is not exceeded, the force, F, applied is proportional to the extension, x, provided temperature is constant.

i.e F = - kx

where k is the constant of proportionality, and the minus sign implies that the force is a restoring force.

The applied force can either be compressing or stretching force.

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1. increase the area of the plates

4. decrease the separation between the plates

5. insert a dielectric between the plates

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The energy stored in a capacitor is given by

U=\frac{1}{2}CV^2

where

C is the capacitance

V is the potential difference across the capacitor

For a parallel-plate capacitor, the capacitance is given by

C=\frac{k \epsilon_0 A}{d}

where

k is the dielectric constant of the material

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A is the area of the plates of the capacitor

d is the separation between the plates

So we can rewrite the energy stored in the capacitor as

U=\frac{k \epsilon_0 A V^2}{2d}

Here the potential difference is kept constant, so the energy depends only on the dielectric constant of the medium, the area and on the distance between the plates. In particular:

- The energy is directly proportional to the area, so as the area increases, the energy will increase

- The energy is inversely proportional to the distance, so as the distance decreases, the energy will increase

- The energy increases if the value of k increases (that is, if a dielectric is put between the plates)

It follows that the correct options to increase the energy are:

1. increase the area of the plates

4. decrease the separation between the plates

5. insert a dielectric between the plates

Learn more about capacitors:

brainly.com/question/10427437

brainly.com/question/8892837

brainly.com/question/9617400

#LearnwithBrainly

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Answer:

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