Chapter 9 & 10 Flashcards
A simple Device using laws of elctrostatics to detect small electric charges
Electroscopes
material whose domains strongly resist changes in the directions of its magnetic field is described as
Magnetically hard
Earth’s north seeking pole is called
South magnetic pole
A circuit that contains a complete path for electrons to flow through is An open circuit
False, closed circut
Law that relates current voltage and resistance is known as Jules law
False, ohm’s law
The extent to which a material can absorb or channel lines of flux is known as permeability
True
The process of diverting unwanted electric charge Directly into the earth is Called grounding
True
A substance That has no unpaired electrons and is slightly repelled by Either pole of a magnet is a diamagnet substance
True
This device transforms energy of an electric current into another useful form of Energy
Load
When an electric field has an equal strength throughout
Uniform field
This is the force that causes the forces electric charge Moving through an electric Field passing through a device
Deflecting force
The extent of a planet’s magnetic field in space
Magnetosphere
The SI unit for resistance
Ohm (Omega Symbol)
The two belts of charged particles located above the earth’s equator to protect the earth from solar wind
Van allen radiation Belts
Is material through which current Does not easily flow
Insulators
This material that allows current to flow through it with no resistance
Superconductor
An electrical device designed to hinder current flow
Resistor
Material through which current flows easily
Conductor
A device that opens and closes a circuit
Switch
Rate of an electric charge flow
Current
Region of Concentrated magnetism at the end of a Magnet
Magnetic pole
What moves when charge flows through an electrolyte
Ion’s
Orientation of the lines of flux when the inclamation at the magnetic poles is 90°
Vertical
What process imparts electric charge at a distance
Induction
The SI unit of current
Ampere
What are used to indicate the direction and strength of a magnetic field.
Lines of flux
What happens to the total current Flowing in a parallel circuit when more branches are added
It Increases
What value equals the product of voltage and current In an Electric Current
The power of the current
What term describes a substance with several unpaired Electrons per atom and is strongly attached to magnets
Ferromagnetic
The Imaginary line That circles the earth halfway in between the two magnetic poles
Magnetic equator
Circuit Protection device That uses a Narrow strip of metal to prevent excessive current through the circuit
Fuse
The most important factor affecting the ease of current flow through a wire
Material
Message of Magnetism used when a needle is Agnitized by holding a magnet Near the needle
Magnetizing by induction
How do two like charges interact when They are brought closer together
They repel
The resistance of a magnet to being demagnetized by another magnetic field
Coercivity
Is the work per unit charge done to Move electric charges between different parts of The electric field
Voltage
