College Physics Reasoning and Relationships

Physics & Astronomy

Quiz 23 :

Electromagnetic Waves

Quiz 23 :

Electromagnetic Waves

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A radio wave transmits 4.8 W/m2 average power per unit area. What is the peak value of the associated magnetic field? (0 = 4 107 Tm/A and c = 3.00 108 m/s)
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C

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What is the maximum value of the electric field E at 0.50 m from a 100 W light bulb radiating in all directions? (µ0 = 4 107 Tm/A, c = 3.00 108 m/s)
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B

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In order of decreasing frequency, which of the following is correct?
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B

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The Earth is 1.49 1011 m from the Sun. If the solar radiation at the top of the Earth's atmosphere is 1340 W/m2, what is the total power output of the Sun?
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An electromagnetic wave with a peak magnetic field component of 7.3 107 T has an associated peak electric field component of what value? (0 = 4 107 Tm/A, 0 = 8.85 1012 C2/Nm2, and c = 3.00 108 m/s)
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How is the direction of propagation of an electromagnetic wave oriented relative to the associated img and img fields?
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The electric field, img , in an electromagnetic wave is oriented in what direction with respect to its associated magnetic field, img ?
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Peak values for a neodymium-glass laser are 1200 J for 1 nanosecond. If the cross section of the laser beam is 1 cm2, what are the maximum values of E and B? (µ0 = 4 107 Tm/A, c = 3.00 108 m/s)
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Maxwell guessed that visible light was an electromagnetic wave because of its:
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A 100-kg spacecraft has a sail of area 300 img that is absorbing sunlight of intensity img . What is the resulting acceleration of the spacecraft?
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Maxwell developed his theory of electromagnetism by combining previous discoveries. He added his own original hypothesis that:
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A radar pulse returns 2.0 104 seconds after it is sent out, having been reflected by an object. What is the distance between the radar antenna and the object? (c = 3.00 108 m/s)
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A 6.0-J pulse of light from a laser has what momentum?
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Determine the amount of energy carried in 50 m of a 3.5-mW He-Ne laser beam if the cross-sectional area of the beam is 5.0 106 m2.
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An electromagnetic wave is made up of which of the following oscillating quantities?
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Which one of the following scientists made the theoretical prediction that electromagnetic waves travel through a vacuum at the speed of light?
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An electromagnetic wave with a peak electric field component of 7.5 102 N/C has what associated peak magnetic field value? (0 = 8.85 1012 C2/Nm2, 0 = 4 107 Tm/A, and c = 3.00 108 m/s)
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An electromagnetic wave with a peak magnetic field component of 3.2 107 T carries what average power per unit area? (0 = 4 107 Tm/A, 0 = 8.85 1012 C2/Nm2, and c = 3.00 108 m/s)
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A solar cell has a light-gathering area of 10 cm2 and produces 0.30 A at 0.80 V (DC) when illuminated with sunlight of intensity 1000 W/m2. What is the efficiency of the solar cell?
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The intensity of light from the Sun is 1.3 kW/m2 at the distance of the Earth. The Earth's radius is 6.4 106 m. If all the sunlight that hits the Earth were absorbed, what would be the magnitude of the resulting force on the Earth?
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