Physics, 24.07.2020 02:01 matthi4687

A charge Q is placed at the center of an inflated latex balloon of radius R. If, you let half the air out of the balloon to let it contract uniformly, the electric flux through the balloon would:

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Answer from: lilquongohard

The electric flux through the balloon remains unchanged.

Explanation:

Letting half of the air out of the balloon will reduce the area of the balloon by 4 times its initial area. Also, since the area is reduced, then, the field lines passing through the balloon will then become closer, or technically increase by four times. The general effect is that there will be no change in the electric flux through the balloon due to the reduced radius.

Mathematically,

Ф = AE

where A is the area of the balloon

E is the electric field around the balloon

Ф is the electric flux around the balloon

If the radius is halved, then the area of the balloon is reduced by four times from A to A/4.

The field through the balloon also increase from E to 4E

The resulting electric flux due to these changes will be

Ф = A/4 * 4E = AE

Technically, the flux does not change.

Answer from: Quest

like poles repel so keep pushing north to north and repels funny to see this

Answer from: Quest

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

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A charge Q is placed at the center of an inflated latex balloon of radius R. If, you let half the ai...

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