The moving charge in the wire causes the compass to deflect; this is because

Physics

2 answers:

Marta_Voda [28]3 years ago

6 0

Answer:

The moving charge induces a magnetic field

Explanation:

According to Faraday's Law, the moving charges in a closed circuit (conductor) induces a magnetic field.

There is a potencial difference called electromotive force, wich is proportional to the magnetic flux through a surface. Matematically this coud be written as

$\epsilon = -\frac{d\Phi}{dt}$

where $\epsilon$ is the EMF, and $\Phi$ is the magnetic flux (the derivative on t means that the magnetic flux is changing in time).

This means that the moving charges, generates an EMF that is proportional to the magnetic flux change.

Therefore, A is the correct answer.

JulijaS [17]3 years ago

5 0

The answer is A. the moving charge induces a magnet field .

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Marta, Cato, and Juan plan a skit to illustrate one of the methods of charging. Marta and Cato are walking together. Each has on

sveta [45]

Answer:

Option D.

Explanation:

Methods of charging:

1. By friction: when two materials of different electro-negativities rub against each, electrons transfer from one material to another.

2. By induction: When a charged body is brought near an uncharged body, the later gets polarized.

3. By conduction: when electrons from one body to another uncharged while contact, it is known as charging by conduction.

Here, a flower is analogous to an electron. A box of candy is positive charge. A bouquet of flowers is like a charged body which is brought near an uncharged body. It induces charge on ti it by causing it to transfer electron to another.

Thus, option D is correct.

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4 years ago

Kamal said the distance from the top of the balloon to the ground in the Example is Ï···· 353 ft. What mistake might Kamal have

snow_lady [41]

Complete question is;

Kamal said the distance from the top of the balloon to the ground in the Example image attached is √353 ft. What mistake might Kamal have made?

Answer:

the mistake Kamal made is that she probably used 17 ft as the perpendicular side of the triangle with b as the hypotenuse instead of using 17ft as the hypotenuse

Explanation:

From the image attached, we can see that the distance from the top of the balloon which is blue in color to the ground is denoted by "b".

Now the triangle is a right angle triangle with hypotenuse = 15ft + 2ft = 17 ft; the adjacent side = 8 ft, while the opposite side is "b".

Thus, we can use pythagoras theorem to solve this as;

b = √(17² - 8²)

b = √(289 - 64)

b = √225

b = 15ft

However,we are told Kamal got b as √353 ft.

From inspection of the calculations we just did, if we had used addition instead of subtraction, we would have gotten b = √353 ft.

Thus, we can under that the mistake Kamal made is that she probably used 17 ft as the perpendicular side of the triangle with b as the hypotenuse instead of using 17ft as the hypotenuse.