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sergij07 [2.7K]
2 years ago
9

If the magnetic field of an electromagnetic wave is in the +x-direction and the electric field of the wave is in the +y directio

n, the wave is traveling in what direction? Explain your answer.
Physics
1 answer:
alexandr1967 [171]2 years ago
7 0

Answer:

Explanation:

The direction of propagation of electromagnetic wave

is given by the direction of vector E x B where E is electrical field , B is magnetic field .

Given Electric field  = E i because it is along x axis

Magnetic field = Bj because it is along y axis

E x B = Ei x Bj

= EB k .

so direction of E  x B is along k direction or z  - axis so wave is propagating along z - axis .

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A 150-W lamp is placed into a 120-V ac outlet. What is the peak current?
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Answer:

Explanation:

Formula

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Givens

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Solution

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Note: This is an edited note. You have to assume that 120 is the RMS voltage in order to go any further. That means that the peak voltage is √2 times the size of 120. The current has the same note applied to it. If the voltage is its rms value, then the current must (assuming the properties of the bulb do not change)

On the other hand, if the voltage is the peak value at 120 then 1.25 will be correct.

However I would go with the other answerer's post and multiply both values by  √2

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We don't have enough information to compare the potential energies of these two objects because we don't know their masses.

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