3 years ago

Which of the following is a field (action-at-a-distance) force?

Physics

1 answer:

Kobotan [32]3 years ago

3 0

Answer:

$F_{grav}$ is a field force, as gravity does not physically apply force and does not require proximity.

Explanation:

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Two long straight wires are parallel and 8.6 cm apart. They are to carry equal currents such that the magnetic field at a point

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Answer:

(a) The current should be in opposite direction

(b) The current needed is 39.8 A

Explanation:

Part (a)

Based, on right hand rule, the current should be in opposite direction

Part (b)

given;

strength of magnetic field, B = 370 µT

distance between the two parallel wires, d = 8.6 cm

$B = \frac{\mu_oI}{2\pi R}$

At the center, the magnetic field strength is twice

$B_c = 2(\frac{\mu_oI}{2\pi R}) =\frac{ \mu_oI}{\pi R}$

R = d/2 = 8.6/2 = 4.3 cm = 0.043 m

$B_c = \frac{ \mu_oI}{\pi R}\\\\I = \frac{B_c\pi R}{\mu_o} = \frac{370 *10^{-6}* \pi *0.043}{4\pi *10^{-7}}\\\\I = 39.8 \ A$

Therefore, current needed is 39.8 A

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The answer is A

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Which produces more carbon dioxide?

Serhud [2]

It depends on the car and the home and what it is producing but most commonly it would be cars producing more carbon dioxide.

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3 years ago

To discover the laws of reflection it is necessary to use a ...<br> 1 point

tamaranim1 [39]

Isn’t it a light box , mirror and / or angle measurer?

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A cannonball is shot up in the air with a vertical speed of 24 miles what is the cannon balls vertical speed just before it hits

meriva

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I think it will back towards the earth because earth gravitional field will attract to Wards

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