EMF_BASICS

What is an electromagnetic field?

• a) A field that consists of electric and magnetic forces forces

• b) A field that only contains electric forces

• c) A field that only contains magnetic forces

• d) A field that consists of gravity and electromagnetic

What is the relationship between electric and magnetic fields?

• a) Electric and magnetic fields are completely independent of each other

• b) Electric fields create magnetic fields

• c) Magnetic fields create electric fields

• d) Electric and magnetic fields are interdependent and can create each other

What is electromagnetic radiation?

• a) A type of sound wave

• b) A type of mechanical wave

• c) A type of light wave

• d) A type of electromagnetic wave

What is Faraday's law of electromagnetic induction?

• a) The law that states that a changing magnetic field will induce an electric field

• b) The law that states that a changing electric field will induce a magnetic field

• c) The law that states that a static electric field will induce a magnetic field

• d) The law that states that a static magnetic field will induce an electric field

What is an electric charge?

• a) A measure of the amount of energy in a system

• b) A measure of the amount of matter in a system

• c) A property of matter that determines its interaction with an electric field

• d) A property of matter that determines its interaction with a magnetic field

What is Coulomb's law?

• a) The law that states that the force between two electric charges is proportional to the product of their charges and inversely proportional to the square of the distance between them

• b) The law that states that the force between two magnetic charges is proportional to the product of their charges and inversely proportional to the square of the distance between them

• c) The law that states that the force between two electric charges is proportional to the product of their masses and inversely proportional to the square of the distance between them

• d) The law that states that the force between two magnetic charges is proportional to the product of their masses and inversely proportional to the square of the distance between them

What is electric potential energy?

• a) The energy stored in an electric field

• b) The energy stored in a magnetic field

• c) The energy stored in a system due to its position in an electric field

• d) The energy stored in a system due to its position in a magnetic field

What is electric potential difference?

• a) The difference in energy stored in two different points in an electric field

• b) The difference in energy stored in two different points in a magnetic field

• c) The difference in electric potential energy between two points in a system

• d) The difference in magnetic potential energy between two points in a system

What is Ohm's law?

• a) The law that states that the current through a conductor between two points is directly proportional to the potential difference across the two points and inversely proportional to the resistance of the conductor

• b) The law that states that the voltage across a conductor between two points is directly proportional to the current passing through the conductor and inversely proportional to the resistance of the conductor

• c) The law that states that the current through a conductor between two points is directly proportional to the resistance of the conductor and inversely proportional to the potential difference across the two points

• d) The law that states that the voltage across a conductor between two points is directly proportional to the resistance of the conductor and inversely proportional to the current passing through the conductor

What is Lenz's law?

• a) The law that states that the direction of the induced current is such that it opposes the change in magnetic field

• b) The law that states that the direction of the induced current is such that it reinforces the change in magnetic field

• c) The law that states that the induced current is proportional to the strength of the magnetic field

• d) The law that states that the induced current is proportional to the strength of the electric field