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4 years ago

What is the relationship between electric currents and magnetic fields?

Physics

1 answer:

Aleksandr [31]4 years ago

7 0

The electric currents induces a magnetic field. They changing magnetic field can be induce an electric current.

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A horseshoe magnet is held vertically with the north pole on the left and south pole on the right. A wire passing between the po

sergejj [24]

Answer:

Force acts vertically downward

Explanation:

Solution:-

The force is downward. The field lines point from the north pole to the south pole, or left to right. We will apply the use of right-hand rule. Your fingers point in the direction of the current (away from you). Curl them in the direction of the field (to the right). Your thumb points in the direction of the force(downward).

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3 years ago

If a star appears to be very red (like Betelgeuse), it is likely to be in which spectral class?

Kipish [7]

It would be spectral class M

hope this helps

7 0

3 years ago

Read 2 more answers

A solid conducting sphere of radius 2 cm has a charge of 8microCoulomb. A conducting spherical shell of inner radius 4 cm andout

nika2105 [10]

Answer:

C) 7.35*10⁶ N/C radially outward

Explanation:

If we apply the Gauss'law, to a spherical gaussian surface with radius r=7 cm, due to the symmetry, the electric field must be normal to the surface, and equal at all points along it.
So, we can write the following equation:

$E*A = \frac{Q_{enc} }{\epsilon_{0}} (1)$

As the electric field must be zero inside the conducting spherical shell, this means that the charge enclosed by a spherical gaussian surface of a radius between 4 and 5 cm, must be zero too.
So, the +8 μC charge of the solid conducting sphere of radius 2cm, must be compensated by an equal and opposite charge on the inner surface of the conducting shell of total charge -4 μC.
So, on the outer surface of the shell there must be a charge that be the difference between them:

$Q_{enc} = - 4e-6 C - (-8e-6 C) = + 4 e-6 C$

Replacing in (1) A = 4*π*ε₀, and Qenc = +4 μC, we can find the value of E, as follows:

$E = \frac{1}{4*\pi*\epsilon_{0} } *\frac{Q_{enc} }{r^{2} } = \frac{9e9 N*m2/C2*4e-6C}{(0.07m)^{2} } = 7.35e6 N/C$

As the charge that produces this electric field is positive, and the electric field has the same direction as the one taken by a positive test charge under the influence of this field, the direction of the field is radially outward, away from the positive charge.

6 0

4 years ago

Which type of force can be used to kick a soccer ball?

Airida [17]

Answer:

The answer is Friction.

Hope this helps :)

Please mark me brainliest :)

6 0

2 years ago

Read 2 more answers

The law of universal gravitation offers a mathematical explanation for the attraction between the moon and Earth.

grandymaker [24]

Answer:

True.

Explanation:

The given statement is true that the law of universal gravitation offers a mathematical explanation for the attraction between the moon and Earth.

According to this law, the forces between two masses can be calculated by the product of their masses and divided by the square of the distance between them. Mathematically, it can be written as :

$F=\dfrac{Gm_1m_2}{r^2}$

G is universal gravitational constant

Hence, the given statement is true.

5 0

3 years ago