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Vocabulary

Electro- Magnetism (EM)

Right-Hand Rule

Transformers

Vocab Electromagnetism (EM) Right-Hand Rule Transformers

Is created when current flows through a wire coil wrapped around a pieced of iron

What is: an electromagnet What is: an electromagnet

What are two main ideas of the cell theory? This type of solution is characterized by water molecules moving into and out of the cell at the same rate A long coil of wire with many loops used to create a large magnetic field

What is: a solenoid What is: a solenoid

A device that converts electric energy to rotational kinetic energy

What is: an electric motor What is: an electric motor

Maintaining conditions suitable for survival A device that is used to detect very small currents

What is: a galvanometer What is: a galvanometer

The process in which current is generated in a wire due to the relative motion between the wire and the magnetic field

What is: EM induction What is: EM induction

Of the following diagrams, the one most similar to what you would expect to see inside the iron of a solenoid

What is: What is:

How many electrons pass through a circuit in 1 second? Of the following, the electromagnet that would produce the magnetic field with the maximum strength: one with 10 loops, 20 loops, or 40 loops

What is: the one with 40 loops What is: the one with 40 loops

One of two ways to increase the magnitude of the magnetic field in an electromagnet

What is: increase the current or the number of loops What is: increase the current or the number of loops

Of the following materials, the one that should be used in addition to a spool of wire to create an electromagnet: glass rod, iron rod, or wood rod

What is: the iron rod What is: the iron rod

What happens to the electromagnet when you reverse the direction of current flow

What is: the poles are reversed What is: the poles are reversed

The part of your hand that indicates the direction of the current when using the right-hand rule

What is: your thumb What is: your thumb

The direction of the magnetic field above the following wire if the current is flowing to the right

What is: out of the page or toward you What is: out of the page or toward you

What is the attractive force between water molecules called? Strands of DNA; contain directions for making protein The direction of the magnetic field inside the following loop if the arrow indicates the direction of the current

What is: out of the page or toward you What is: out of the page or toward you

The direction of the magnetic field to the left of the following wire if current is flowing upward

What is: out of the page or toward you What is: out of the page or toward you

The direction of current if the direction of the magnetic field is clockwise

What is: into the page or away from you What is: into the page or away from you

The relationship between the number of turns on the primary coil compared to the number of turns on the secondary coil of a step- down transformer

What is: primary is greater than secondary What is: primary is greater than secondary

A transformer can step this up but in no way can step up this

What is: voltage then power or energy What is: voltage then power or energy

How power delivered to the secondary circuit relates to the power delivered to the primary circuit of a transformer

What is: they are equal to one another What is: they are equal to one another

A step-up transformer does this to voltage and this to current

What is: increase voltage and decrease current What is: increase voltage and decrease current

The voltage across the secondary circuit of a step- up transformer that has 250 turns on its primary coil, 7000 turns on its secondary coil, and a primary voltage of 18.0 V

What is: 504 V What is: 504 V

FinalJeopardy

Transformers

The current in the primary circuit of a step-up transformer if the primary coil has 40 turns, the secondary coil has 1200 turns, and the current in the secondary circuit is 1.50 A

What is: 45.0 A What is: 45.0 A

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