Please do not just guess. Provide work or brief explanation to support answer. 5

Question

Please do not just guess. Provide work or brief explanation to support answer.

5of 20 Which of the following is a true statement? Electromagnetic waves deliver an oscillating amount of energy to a given area of space each second Electromagnetic waves deliver a constant amount of energy to a given area of space each second. Electromagnetic waves deliver a steadily decreasing amount of energy to a given area of space each second. Electromagnetic waves do not deliver energy. Got 20 Which of the following is a true statement? Movement of charge creates magnetic fields. Changes in electric fields create magnetic fields. Both of the above statements are true. None of the above statements are true. ot 20 The reason why humans cannot see infrared waves is because the waves are too short for human eyes to detect. the waves are too long for human eyes to detect the waves are too fast for human eyes to detect. human eyes cannot detect electromagnetic waves. 8ot 20 What is the peak electric field strength of an EM wave if the peak magnetic field strength is 0.1 T? 3 x 108 N/C 0.1 N/C C 3x 109 N/C 3 x 107 N/C

Explanation / Answer

Solution 5- energy density of electromagnetic wave is propotional to square of the amplitude of electric field which is oscillating with time. Hence, statement 1 is correct.

Solution 6- moving charge and changing electric field, both creates magnetic field. Hence, statement 3 is correct.

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