Answer:. Option c
Explanation: the speed of an electromagnetic wave is simply the vector product of the magnetic field and the electric field.
The direction of the velocity is the direction of the electromagnetic wave.
The wave is already moving towards the negative y axis (-j) and the magnetic field is already pointing towards the positive x axis (i)
From cross product of unit vectors
i × j = k
i × k = - j
With the second identity, we can see that the electric field will be pointing towards the positive of the x axis (k).
Option c is validated
Answer:
In first class lever the fulcrum lies between the effort and the load the effort lies on the left side and load lies on the right side .
Explanation:
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Answer:
is there anything that is a hint? like a picture or a story?
Explanation:
When plane is flying along the wind then we can say



Now when its going against the wind the speed is given by



Now by the above two equations we will have

