PHY112 RIO SALADO LESSON 9 QUIZ
EXAM QUESTIONS AND ANSWERS
What is the purpose of a transformer? - ANSWER-Transformers change the voltage in a
circuit.
The length of a linear broadcasting antenna is oriented in the y plane. A linear receiving
antenna should be oriented in the - ANSWER-Y plane
Wave intensity is defined as the - ANSWER-rate of energy delivered to a certain area.
Which of the following is a true statement? - ANSWER-Electromagnetic waves deliver
an oscillating amount of energy to a given area of space each second.
What is the peak magnetic field strength of an EM wave if the peak electric field
strength is 3500 N/C? - ANSWER-1.2 x 10^-5 T
The speed of an electromagnetic wave depends on - ANSWER-none of the above
A particular electromagnetic wave has a frequency of 5 x 10^17 Hz. What is the
wavelength of the wave? - ANSWER-6 x 10^-10 m
Red light has a wavelength of 6.5 x 10^-7 m. What is the frequency of red light? -
ANSWER-4.6 x 10^14 Hz
The primary difference between x-ray waves and radio waves is - ANSWER-X-ray
waves are higher frequency
A maximum peak in an oscillating magnetic field occurs at some time t. At the same
time t, the electric field will experience - ANSWER-a maximum peak
A particular electromagnetic wave has a peak magnetic field strength of 5 x 10^-5 T.
What is the average intensity of the electromagnetic wave? - ANSWER-2.99 x 10^5
W/m^2
Which of the following factors will affect the intensity of an EM wave? - ANSWER-
Amplitude
What is the peak electric field strength of an EM wave if the peak magnetic field
strength is 0.1 T? - ANSWER-3 x 10^7 N/C
EXAM QUESTIONS AND ANSWERS
What is the purpose of a transformer? - ANSWER-Transformers change the voltage in a
circuit.
The length of a linear broadcasting antenna is oriented in the y plane. A linear receiving
antenna should be oriented in the - ANSWER-Y plane
Wave intensity is defined as the - ANSWER-rate of energy delivered to a certain area.
Which of the following is a true statement? - ANSWER-Electromagnetic waves deliver
an oscillating amount of energy to a given area of space each second.
What is the peak magnetic field strength of an EM wave if the peak electric field
strength is 3500 N/C? - ANSWER-1.2 x 10^-5 T
The speed of an electromagnetic wave depends on - ANSWER-none of the above
A particular electromagnetic wave has a frequency of 5 x 10^17 Hz. What is the
wavelength of the wave? - ANSWER-6 x 10^-10 m
Red light has a wavelength of 6.5 x 10^-7 m. What is the frequency of red light? -
ANSWER-4.6 x 10^14 Hz
The primary difference between x-ray waves and radio waves is - ANSWER-X-ray
waves are higher frequency
A maximum peak in an oscillating magnetic field occurs at some time t. At the same
time t, the electric field will experience - ANSWER-a maximum peak
A particular electromagnetic wave has a peak magnetic field strength of 5 x 10^-5 T.
What is the average intensity of the electromagnetic wave? - ANSWER-2.99 x 10^5
W/m^2
Which of the following factors will affect the intensity of an EM wave? - ANSWER-
Amplitude
What is the peak electric field strength of an EM wave if the peak magnetic field
strength is 0.1 T? - ANSWER-3 x 10^7 N/C
