PHY 112: leading up to Final Exam
Questions & Answers (Grade A+)
QUIZ 9: EM Waves -
Which of the following is a true statement?
A. Electric fields direct away from both positive and negative
charges.
B. Electric fields direct towards both positive and negative charges.
C. Electric fields direct away from positive charges and towards
negative charges.
D. Electric fields direct towards positive charges and away from
negative charges. -
correct answer ✅Electric fields direct away from positive charges
and towards negative charges.
Current is moving to the right through the wire shown below. A
stationary wire loop is located at a position below the wire. Which
of the following statements is accurate? -
correct answer ✅The loop is not experiencing an induced current,
but moving the loop up or down will induce a current.
, PHY 112: leading up to Final Exam
Questions & Answers (Grade A+)
Which of the following is a true statement?
A. Movement of charge creates magnetic fields.
B. Changes in electric fields create magnetic fields.
C. Both of the above statements are true.
D. None of the above statements are true. -
correct answer ✅C, both of the above statements are true
A maximum peak in an oscillating magnetic field occurs at some
time t. At the same time t, the electric field will experience:
Max peak
Min peak
Zero strength field
None -
correct answer ✅Max Peak
What is the electric field strength of an EM wave if the peak
intensity of the wave is 5000 W/m2? -
correct answer ✅1372 W/m^2
Questions & Answers (Grade A+)
QUIZ 9: EM Waves -
Which of the following is a true statement?
A. Electric fields direct away from both positive and negative
charges.
B. Electric fields direct towards both positive and negative charges.
C. Electric fields direct away from positive charges and towards
negative charges.
D. Electric fields direct towards positive charges and away from
negative charges. -
correct answer ✅Electric fields direct away from positive charges
and towards negative charges.
Current is moving to the right through the wire shown below. A
stationary wire loop is located at a position below the wire. Which
of the following statements is accurate? -
correct answer ✅The loop is not experiencing an induced current,
but moving the loop up or down will induce a current.
, PHY 112: leading up to Final Exam
Questions & Answers (Grade A+)
Which of the following is a true statement?
A. Movement of charge creates magnetic fields.
B. Changes in electric fields create magnetic fields.
C. Both of the above statements are true.
D. None of the above statements are true. -
correct answer ✅C, both of the above statements are true
A maximum peak in an oscillating magnetic field occurs at some
time t. At the same time t, the electric field will experience:
Max peak
Min peak
Zero strength field
None -
correct answer ✅Max Peak
What is the electric field strength of an EM wave if the peak
intensity of the wave is 5000 W/m2? -
correct answer ✅1372 W/m^2
