AC HPAT PHYSICS EXAM STUDY GUIDE LATEST 2026 UPDATED
QUESTIONS AND VERIFIED 100% SOLUTIONS (2026/2027)
GRADE: A+|STATUS: GUARANTEED PASS
Alternating current vs direct current - Answers -· AC vs. DC (Alternating Current vs. Direct
current) The difference between AC and DC lies in the direction in which the electrons flow. In
DC, the electrons flow steadily in a single direction, or "forward." In AC, electrons keep
switching directions, sometimes going "forward" and then going "backward."
Electric potential difference - Answers -· Electric potential difference, also known as voltage, is
the external work needed to bring a charge from one location to another location in an electric
field. Electric potential difference is the change of potential energy experienced by a test charge
that has a value of +1 .
Resistance - Answers -· Resistance is an electrical quantity that measures how the device or
material reduces the electric current flow through it. The resistance is measured in units of
ohms (Ω).
Power - Answers -· Power is the rate at which work is done. ... Great power means a large
amount of work or energy developed in a short time. For example, when a powerful car
accelerates rapidly, it does a large amount of work and consumes a large amount of fuel in a
short time.
Energy - Answers -· Energy, in physics, the capacity for doing work. It may exist in potential,
kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat
and work—i.e., energy in the process of transfer from one body to another.
1|Page
, Permanent Magnet - Answers -· A permanent magnet is a ferromagnetic material that possesses
permanent magnetic properties, even when it is not located within a magnetic field. One end of
the magnet is called the north pole, the other the south pole.
Electromagnet - Answers -· An electromagnet is a magnet that runs on electricity. Unlike a
permanent magnet, the strength of an electromagnet can easily be changed by changing the
amount of electric current that flows through it. The poles of an electromagnet can even be
reversed by reversing the flow of electricity.
magnetic field - Answers -· A magnetic field is a vector field that describes the magnetic
influence of electric charges in relative motion and magnetized materials. A charge that is
moving parallel to a current of other charges experiences a force perpendicular to its own
velocity.
Motor Principle - Answers -the motor principle states that the current-carrying wire should
experience a force perpendicular to both the magnetic field and the direction of the current,
which in this case was horizontal.
Ohm's Law - Answers -· Ohm's law is a law that states that the voltage across a resistor is
directly proportional to the current flowing through the resistance. Ohm's law is named for
German physicist Georg Ohm (1789-1854). A simple formula, Ohm's law, is used to show the
relationship of current, voltage, and resistance.
2|Page
QUESTIONS AND VERIFIED 100% SOLUTIONS (2026/2027)
GRADE: A+|STATUS: GUARANTEED PASS
Alternating current vs direct current - Answers -· AC vs. DC (Alternating Current vs. Direct
current) The difference between AC and DC lies in the direction in which the electrons flow. In
DC, the electrons flow steadily in a single direction, or "forward." In AC, electrons keep
switching directions, sometimes going "forward" and then going "backward."
Electric potential difference - Answers -· Electric potential difference, also known as voltage, is
the external work needed to bring a charge from one location to another location in an electric
field. Electric potential difference is the change of potential energy experienced by a test charge
that has a value of +1 .
Resistance - Answers -· Resistance is an electrical quantity that measures how the device or
material reduces the electric current flow through it. The resistance is measured in units of
ohms (Ω).
Power - Answers -· Power is the rate at which work is done. ... Great power means a large
amount of work or energy developed in a short time. For example, when a powerful car
accelerates rapidly, it does a large amount of work and consumes a large amount of fuel in a
short time.
Energy - Answers -· Energy, in physics, the capacity for doing work. It may exist in potential,
kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat
and work—i.e., energy in the process of transfer from one body to another.
1|Page
, Permanent Magnet - Answers -· A permanent magnet is a ferromagnetic material that possesses
permanent magnetic properties, even when it is not located within a magnetic field. One end of
the magnet is called the north pole, the other the south pole.
Electromagnet - Answers -· An electromagnet is a magnet that runs on electricity. Unlike a
permanent magnet, the strength of an electromagnet can easily be changed by changing the
amount of electric current that flows through it. The poles of an electromagnet can even be
reversed by reversing the flow of electricity.
magnetic field - Answers -· A magnetic field is a vector field that describes the magnetic
influence of electric charges in relative motion and magnetized materials. A charge that is
moving parallel to a current of other charges experiences a force perpendicular to its own
velocity.
Motor Principle - Answers -the motor principle states that the current-carrying wire should
experience a force perpendicular to both the magnetic field and the direction of the current,
which in this case was horizontal.
Ohm's Law - Answers -· Ohm's law is a law that states that the voltage across a resistor is
directly proportional to the current flowing through the resistance. Ohm's law is named for
German physicist Georg Ohm (1789-1854). A simple formula, Ohm's law, is used to show the
relationship of current, voltage, and resistance.
2|Page
