Physics, 26.10.2020 17:30 bl6659

What is the magnetic field strength at point a? Express your answer to two significant figures and include the appropriate units.

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Answer from: Asantetaedog8934

Complete Question

The diagram for this question is shown on the first uploaded image

The value is $B_A = 8*10^{-5} \ T$

Explanation:

From the diagram we see that

The distance of the magnetic field generated by first wire to point a is

$l_1 = 2 \ cm = 0.02 \ m$

The distance of the magnetic field generated by second wire to point a is

$l_2 = 4 + 2 =6 \ cm = 0.06 \ m$

Let the current passing through both wire be $I_1 = I_2 = I = 12 \ A$

Generally the the magnetic field strength at point a is mathematically represented as

$B_A = \frac{\mu_o * I_1 }{ 2 * \pi * l_1 } - \frac{\mu_o * I_1 }{ 2 * \pi * l_2 }$

=> $B_A = \frac{\mu_o }{ 2 * \pi } * [\frac{I_1 }{ l_1 } - \frac{I_2}{l_2} ]$

Generally $\mu_o$ is the permeability of free space with value $\mu_o = 4\pi * 10^{-7} N/A^2$

$B_A = \frac{ 4\pi * 10^{-7} }{ 2 * 3.142 } * [\frac{12}{ 0.02} - \frac{12}{0.06} ]$

=> $B_A = 8*10^{-5} \ T$

What is the magnetic field strength at point a? Express your answer to two significant figures and i

Answer from: Quest

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this. hope that you like the video and that it explains more in detail to you.

that is the link.

Answer from: Quest

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.

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