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Lesson: Electric and Magnetic Fields in Electromagnetic Waves

Worksheet: Electric and Magnetic Fields in Electromagnetic Waves • 6 Questions

Q1:

A radio transmitter broadcasts plane electromagnetic waves whose electric field amplitude at a particular location is V/m. What is the amplitude of the electromagnetic wave’s magnetic field at that location?

  • A T
  • B T
  • C T
  • D T
  • E T

Q2:

A plane electromagnetic wave travels northward. At one instant, its electric field has a magnitude of 6.0 V/m and points eastward. What is the magnitude of the magnetic field at this instant?

  • A T
  • B T
  • C T
  • D T
  • E T

Q3:

A certain 60.0-Hz ac power line radiates an electromagnetic wave having a maximum electric field strength of 13.0 kV/m.

What is the wavelength of this very-low-frequency electromagnetic wave?

  • A m
  • B m
  • C m
  • D m
  • E m

What is the magnitude of the strongest magnetic field present in this wave?

  • A T
  • B T
  • C T
  • D T
  • E T

Q4:

A radio station broadcasts at a frequency of 760 kHz. At a receiver some distance from the antenna, the maximum magnetic field of the electromagnetic wave detected is T.

What is the maximum electric field amplitude?

  • A V/m
  • B V/m
  • C V/m
  • D V/m
  • E V/m

What is the wavelength of the electromagnetic wave?

Q5:

During a heartbeat, a heart produces a maximum potential of 4.00 mV across a 0.300-m distance. The changing potential generates a 1.00-Hz electromagnetic wave.

What is the maximum electric field strength produced during the heartbeat?

  • A V/m
  • B V/m
  • C V/m
  • D V/m
  • E V/m

What is the maximum magnetic field strength produced during the heartbeat?

  • A T
  • B T
  • C T
  • D T
  • E T

What is the wavelength of the electromagnetic wave produced by the heartbeat?

  • A m
  • B m
  • C m
  • D m
  • E m
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