Rio Salado PHY 112 Final Review Questions & Answers (Grade A+).docx

Rio Salado PHY 112 Final Review
Questions & Answers (Grade A+)
In the context of Faraday's law, what does the negative sign in the
equation signify?


A) It indicates a positive change in flux
B) It indicates a negative change in flux
C) It signifies the direction of the induced EMF
D) It signifies the direction of the magnetic field -
correct answer ✅C) It signifies the direction of the induced EMF


What is the purpose of a transformer in an electrical circuit?


A) To convert electric energy into work
B) To change the direction of current flow
C) To change the voltage in a circuit
D) To increase the resistance of the circuit -
correct answer ✅C) To change the voltage in a circuit


According to Faraday's law, what induces an EMF in a generator?


A) Change in the magnetic field strength

, Rio Salado PHY 112 Final Review
Questions & Answers (Grade A+)
B) Change in the loop area
C) Change in the angle between the loop and the magnetic field
D) Change in the number of loops -
correct answer ✅C) Change in the angle between the loop and the
magnetic field


What does Ampere's circuit law describe?


A) The behavior of electric field lines
B) The behavior of magnetic field lines
C) How magnetic fields are created by moving charges or changing
electric fields
D) The relationship between electric and magnetic flux -
correct answer ✅C) How magnetic fields are created by moving
charges or changing electric fields


How are electric and magnetic waves related according to
Maxwell's equations?


A) They are always in phase with each other
B) They are always out of phase with each other