Answer:
Conservation of energy
Explanation:
The law of conservation of energy states that energy is usually conserved and is not produced, rather is is manipulated from one form to another.
To solve this problem we will proceed to convert the Intensity Units given to a normal system, that is, to standardize their value. Later we will use the value of the electric field according to the RMS electric field, to find it.
Finally the magnetic field would be given based on the previously found electric field, depending on the speed of light:
The value of the intensity is:

The maximum value of the electric field is,


Where,
I = Intensity,
= Permeability constant
c = Speed of light
Replacing,


The maximum value of the magnetic field is,



Therefore the maximum magnetic field is 
Hi Pupil Here is your answer ::
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1 The shape of the Body
Example : The shape of the ball lying on a floor can be changed by pressing it.
2 Direction of the Body
Example : The direction of motion of moving ball can be changed by hitting it with a bat.
3 The speed of the Body
Example : A ball at rest can be set in motion if force is applied only
4. Size of the Body
Example : The length of a spring tied and on one end can be increased by pulling it.
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Hope this helps .......