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Tanzania [10]
3 years ago
7

A magnetic compass is placed near an insulated copper wire. When the wire is connected to a battery and a current is created, th

e compass needle moves and changes its position. Which is the best explanation for the production of a force that causes the needle to move?
(1)The copper wire magnetizes the compass needle and exerts the force on the compass needle.
(2)The compass needle magnetizes the copper wire and exerts the force on the compass needle.
(3)The insulation on the wire becomes charged, which exerts the force on the compass needle.
(4)The current in the wire produces a magnetic field that exerts the force on the compass needle.
Physics
2 answers:
olga nikolaevna [1]3 years ago
5 0

acts at a distance. fjghfrhgdfuighuidfgui

Luba_88 [7]3 years ago
4 0
4

Every current through a wire produced a magnetic field. And since the magnetic field of Earth is weak, it will get attracted towards the wire.
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A mixture of blue & red light.

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3 years ago
What are the different types of topology?​
dolphi86 [110]

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3 0
2 years ago
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Light of wavelength 400 nm is incident on a single slit of width 15 microns. If a screen is placed 2.5 m from the slit. How far
olganol [36]

Answer:

0.0667 m

Explanation:

λ = wavelength of light = 400 nm = 400 x 10⁻⁹ m

D = screen distance = 2.5 m

d = slit width = 15 x 10⁻⁶ m

n = order = 1

θ = angle = ?

Using the equation

d Sinθ = n λ

(15 x 10⁻⁶) Sinθ = (1) (400 x 10⁻⁹)

Sinθ = 26.67 x 10⁻³

y = position of first minimum

Using the equation for small angles

tanθ = Sinθ = y/D

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5 0
3 years ago
To pull an old stump out of the ground, you and a friend tie two ropes to the stump. You pull on it with a force of 500 N to the
zhannawk [14.2K]

Answer:

C. less than 950 N.

Explanation:

Given that

Force in north direction F₁ = 500 N

Force in the northwest F₂ = 450 N

Lets take resultant force R

The angle between force = θ

θ = 45°

The resultant force R

R=\sqrt{F_1^2+F_2^2+2F_1F_2cos\theta}

R=\sqrt{500^2+450^2+2\times 450\times 500\times cos\theta}

R= 877.89 N

Therefore resultant force is less than 950 N.

C. less than 950 N

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mixer [17]

Answer:

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