Rio Salado PHY 112 Final Review
Questions and Verified Solutions
100% Correct Answers Already
Graded A+
QUESTIONS AND ANSWERS
QUESTIONS ANSWER
In the context of Faraday's law, what does C) It signifies the direction of the induced
the negative sign in the equation signify? EMF
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
What is the purpose of a transformer in an C) To change the voltage in a circuit
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
According to Faraday's law, what induces C) Change in the angle between the loop
an EMF in a generator? and the magnetic field
A) Change in the magnetic field strength
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
What does Ampere's circuit law describe? C) How magnetic fields are created by
moving charges or changing electric fields
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
How are electric and magnetic waves D) They occur together and travel
related according to Maxwell's equations? perpendicular to each other
A) They are always in phase with each
other
B) They are always out of phase with each
other
C) They are unrelated phenomena
D) They occur together and travel
perpendicular to each other
What is the relationship between the speed A) Speed is directly proportional to the
of an electromagnetic wave and the amplitude of the electric field
amplitude of the electric and magnetic
fields?
A) Speed is directly proportional to the
amplitude of the electric field
B) Speed is inversely proportional to the
amplitude of the electric field
C) Speed is directly proportional to the
amplitude of the magnetic field
D) Speed is inversely proportional to the
amplitude of the magnetic field
What is the relationship between the C) The energy is proportional to the square
energy of an electromagnetic wave and the of the amplitude
amplitude of its electric or magnetic field?
A) The energy is directly proportional to
the amplitude
B) The energy is inversely proportional to
the amplitude
C) The energy is proportional to the square
of the amplitude
D) The energy is unrelated to the
amplitude
What are the SI units of intensity? C) Watts per meter squared
A) Newtons per meter squared
B) Joules per meter squared
C) Watts per meter squared
D) Hertz per meter squared
Questions and Verified Solutions
100% Correct Answers Already
Graded A+
QUESTIONS AND ANSWERS
QUESTIONS ANSWER
In the context of Faraday's law, what does C) It signifies the direction of the induced
the negative sign in the equation signify? EMF
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
What is the purpose of a transformer in an C) To change the voltage in a circuit
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
According to Faraday's law, what induces C) Change in the angle between the loop
an EMF in a generator? and the magnetic field
A) Change in the magnetic field strength
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
What does Ampere's circuit law describe? C) How magnetic fields are created by
moving charges or changing electric fields
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
How are electric and magnetic waves D) They occur together and travel
related according to Maxwell's equations? perpendicular to each other
A) They are always in phase with each
other
B) They are always out of phase with each
other
C) They are unrelated phenomena
D) They occur together and travel
perpendicular to each other
What is the relationship between the speed A) Speed is directly proportional to the
of an electromagnetic wave and the amplitude of the electric field
amplitude of the electric and magnetic
fields?
A) Speed is directly proportional to the
amplitude of the electric field
B) Speed is inversely proportional to the
amplitude of the electric field
C) Speed is directly proportional to the
amplitude of the magnetic field
D) Speed is inversely proportional to the
amplitude of the magnetic field
What is the relationship between the C) The energy is proportional to the square
energy of an electromagnetic wave and the of the amplitude
amplitude of its electric or magnetic field?
A) The energy is directly proportional to
the amplitude
B) The energy is inversely proportional to
the amplitude
C) The energy is proportional to the square
of the amplitude
D) The energy is unrelated to the
amplitude
What are the SI units of intensity? C) Watts per meter squared
A) Newtons per meter squared
B) Joules per meter squared
C) Watts per meter squared
D) Hertz per meter squared
