PHY 112 Final Exam Questions &
Answers (Grade A+)
Which of the following factors will affect the intensity of an EM
wave? -
correct answer ✅Amplitude
The reason why humans cannot see infrared waves is because -
correct answer ✅the waves are too long for human eyes to detect.
Which of the following is a true statement about Electromagnetic
waves? -
correct answer ✅Electromagnetic waves deliver an oscillating
amount of energy to a given area of space each second.
A wire loop sits motionless in a uniform magnetic field as shown
below. Which of the following changes will induce a clockwise
current in the loop? -
correct answer ✅Increase the magnetic field strength.
A 15-turn circular wire loop with a radius of 3.0 cm is initially in a
uniform magnetic field with a strength of 0.5 T. The field decreases
, PHY 112 Final Exam Questions &
Answers (Grade A+)
to zero over a time of 0.10 sec. What is the induced emf? -
correct answer ✅0.21 V
Which of the following is a true statement about electric fields? -
correct answer ✅Electric fields direct away from positive charges
and towards negative charges.
Which of the following is a true statement about magnetic fields? -
correct answer ✅Magnetic fields cannot have monopoles.
The primary difference between x-ray waves and radio waves is -
correct answer ✅X-ray waves are higher frequency.
Current travels to the right through the wire as shown below. What
is the direction of the magnetic field at the position marked by the
X? -
correct answer ✅Into the screen
Red light has a wavelength of 6.5 x 10^-7 m. What is the frequency
of red light? -
correct answer ✅4.6 x 10^14 Hz
Answers (Grade A+)
Which of the following factors will affect the intensity of an EM
wave? -
correct answer ✅Amplitude
The reason why humans cannot see infrared waves is because -
correct answer ✅the waves are too long for human eyes to detect.
Which of the following is a true statement about Electromagnetic
waves? -
correct answer ✅Electromagnetic waves deliver an oscillating
amount of energy to a given area of space each second.
A wire loop sits motionless in a uniform magnetic field as shown
below. Which of the following changes will induce a clockwise
current in the loop? -
correct answer ✅Increase the magnetic field strength.
A 15-turn circular wire loop with a radius of 3.0 cm is initially in a
uniform magnetic field with a strength of 0.5 T. The field decreases
, PHY 112 Final Exam Questions &
Answers (Grade A+)
to zero over a time of 0.10 sec. What is the induced emf? -
correct answer ✅0.21 V
Which of the following is a true statement about electric fields? -
correct answer ✅Electric fields direct away from positive charges
and towards negative charges.
Which of the following is a true statement about magnetic fields? -
correct answer ✅Magnetic fields cannot have monopoles.
The primary difference between x-ray waves and radio waves is -
correct answer ✅X-ray waves are higher frequency.
Current travels to the right through the wire as shown below. What
is the direction of the magnetic field at the position marked by the
X? -
correct answer ✅Into the screen
Red light has a wavelength of 6.5 x 10^-7 m. What is the frequency
of red light? -
correct answer ✅4.6 x 10^14 Hz
