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3 years ago

Magnetic field lines form closed loops:________.

Physics

1 answer:

ololo11 [35]3 years ago

6 0

Answer:

d) All of the above.

Explanation:

Magnetic field lines are formed around an object when there is a magnetic field around the object. From the question, we know that a bar magnet has an electric field. A current carrying loop has a magnetic field around it also. Current carrying straight wires and any conductor generally, carrying an electric current, produces a magnetic field around them. This magnetic field has lines of loos formed close to the material.

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Answer:

Photosynthetic organisms

Explanation:

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3 years ago

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borishaifa [10]

Explanation:

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Svetach [21]

D)
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3 years ago

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A square loop of length 0.1 m on each side is sitting in a magnetic field that is increasing at a rate of 0.1 T/second. What can

Zolol [24]

Answer:

The induced emf can be found by Faraday’s Law.

$\epsilon = -\frac{d\Phi_B}{dt}$

$\Phi_B = BA = B(0.1)^2 = 0.01B$

The magnetic field is increasing at a rate of 0.1T/s. So,

$\frac{dB}{dt} = 0.1$

Finally,

$\epsilon = \frac{dBA}{dt} = 0.01\frac{dB}{dt} = 0.01\times 0.1 = 0.001 V$

Explanation:

Faraday’s Law states that a change in the magnetic flux induces an emf in the circuit. The magnetic flux is the multiplication of magnetic field and the area of the loop. The area of the loop is simple, and the change of magnetic field as a function of time is given in the question.

The minus sign in front of the Faraday’s Law means that the induced current always opposes the change of the magnetic flux. Since we do not know the direction of the magnetic field in this question, we cannot find the direction of the induced emf on the loop.

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3 years ago

What is the magnitude of the displacement of a car with an acceleration of 3.75 m/s2 as it increases its speed from 5.20m/s to 1

NeX [460]

Answer:

20.7 m

Explanation:

using v^2=u^2+2as

s=(v^2-u^2)/2a

v=13.5

u=5.2

a=3.75

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3 years ago