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labwork [276]
3 years ago
6

Which statement about electromagnet is true

Physics
2 answers:
Snowcat [4.5K]3 years ago
7 0

Answer: It doesn’t function without a source of current

Explanation:

In an electromagnet, the magnetic field is generated by an electric current in a coil of wire which reinforces an iron core. But when the electric current applied on the mentioned core is disconnected, it immediately loses its magnetization. This also means that the intensity of the magnetic field can be controlled (increased or decreased) by changing the intensity of the electric current flowing through the nucleus.  

That is why an electromagnet does not work without electric current.

avanturin [10]3 years ago
3 0

Answer:

<h2>It doesn’t function without a source of current.</h2>

Explanation:

An electromagnet is defined as a magnet where its magnetic field is generated by an electrical current.

A simple form of an electromagnet is coil of wire wrapped around an iron core. The iron material helps to intensity the magnetic field.

Additonally, the strength of the magnetic field depends directly on the amount of current.

Therefore, the right answer is the first choice, because an electromagnet won't work without a current.

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2.2 kg box is being dragged to right with 31.06 N force and accelerating at 3.2 m/s^2 how strong is force of friction acting on
insens350 [35]

24. 02 N force of friction acting on the box.

<h3 /><h3>What is force?</h3>

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Force = mass. acceleration

Force = (2.2).(3.2)

Force = 7.04 N

Total force applied is 31.06 N

Frictional force = 31.06 - 7.04

Frictional force = 24. 02 N

24. 02 N force of friction acting on the box.

<h3 />

To learn more about force refer to the link:

brainly.com/question/13191643

#SPJ1

4 0
1 year ago
An apple falls straight down from a tree and hits the ground in approximately 0.75 seconds. Based on this information, which is
Mnenie [13.5K]

Answer:

y = 2.76 [m]

Explanation:

We can find the distance of the fall of the apple using the following kinematic equation, we have to emphasize that this is a typical problem of free fall, so the initial speed is zero, then we give the initial data.

t = time = 0,75[s]

g = gravity = 9.81[m/s^2]

v0 = 0

y = v_{0}*t+0.5*g*t^{2}\\ y=0.5*(9.81)*(0.75)^{2}\\y= 2.76[m]

3 0
4 years ago
Would this be 2N because 6 and 4 cancel out? Or no because 4 plus two is six and that cancels everything out to 0
soldier1979 [14.2K]

Answer: It would be 0

Explanation: Because like you said it would cancel each other out because if you are going 6N to the right and then you go 6N to the left you are actually not moving at all  

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Why is it harder to get something moving than to keep it moving?
vovikov84 [41]

Answer:

momentum

Explanation:

when something starts rolling momentum keeps it going.

6 0
3 years ago
What is nuclear energy?
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Answer: D. Energy released from atoms.

7 0
4 years ago
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