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2 years ago

The strength of a magnetic field follows _____.

Physics

2 answers:

ycow [4]2 years ago

8 0

I think its Coulomb's law<span>
</span>

Orlov [11]2 years ago

5 0

Answer: The correct answer is "law of poles".

Explanation:

Magnetic field lines: These are the area around the magnet in which the magnetic force can be experienced. The strength of the magnetic field is stronger at the poles of the magnet. It decreases from the poles.

The direction of the magnetic field lines is from north pole to south pole.

Law of poles: The same poles of the magnets repel each other with magnetic force of repulsion between the poles.

The opposite poles of the magnets attract each other with the magnetic force of attraction between the poles.

The strength of the magnetic field does not follow an inverse square law. The force from the magnet decreases faster than an inverse square law because all magnets have two opposite poles and single pole does not exist.

Therefore, The strength of a magnetic field follows law of poles.

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2 years ago

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garik1379 [7]

The correct answer to the question is: 78.4 N.

EXPLANATION:

As per the question, the mass of the object is given as m = 8 Kg.

We are asked to calculate the normal force of the object.

The object is resting on the table.

Hence, the object pushes the table downward with a force equal to it's weight.

The table, in turn, pushes the object with the same force as given by the object, but in the upward direction.

The force given by the table on the object is known as the normal reaction of the object which acts perpendicular to the surface of the object.

Hence, the normal reaction is equal to the weight of the body.

The weight of a body is the product of it's mass with acceleration due to gravity.

So, the weight of 8 Kg object is calculated as -

Weight = mg

= 8 × 9.8 N.

= 78.4 N.

Here, g is known as acceleration due to gravity.

Hence, the normal force pushing up from the table is 78.4 N.

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