3.2: Static Electricity and Conduction Flashcards
Option B: four electrons in the outer shell
Conductor has 3 or less electrons in outer shell
Semi-conductor has 4 electrons in outer shell
Insulator has 5 - 8 electrons in outer shell
Conductor has ___________________
Semi-conductor has_________________
Insulator has _________________
(electrons)
Conductor has 3 or less electrons in outer shell
Semi-conductor has 4 electrons in outer shell
Insulator has 5 - 8 electrons in outer shell
Option B: liquids and gasses
Option B: solids and liquids only
Option B: glass
Option B: the use of a conducting type nose wheel
Usually, the nose wheel tyre contains graphite, to dissipate the static electricity on landing
Option A: a small number of electrons in its outer orbit
The lower the number of electrons in the outer shell, the more readily it will give them up.
Conductor 3 or less electrons in outer shell
Semi-conductor has 4 electrons in its outer shell
Insulator has 5-8 electrons in its outer shell
Option A: a surplus or deficiency of electrons
If it has a surplus of electrons it is negatively charged. A deficiency of electrons makes it positively charged
Option A: by connecting all metal components by bonding
Option B: stop different potentials developing with subsequent fire risks
Option B: bonding
Option A: structure is adequately bonded
Option C: positively charged
The free electrons in the conductor will be repelled away from the rod, leaving that end positively charged
Option B: inversely proportional to the square of the distance between them
Option C: the rod becomes positively charged
The negative charge on the rod are repelled by the charged conductor (regardless of installation)
- The force that keeps the electrons orbiting the nucleus of an atom is called the;
(a) The magnetic force.
(b) The electrostatic force,
(c) The gravitational force
(b) The electrostatic force,
The electrostatic force is the force of attraction or repulsion between two charged particles. It is also called Coulomb’s force or Coulomb’s interaction.
- Coulomb’s Law of electrostatic states that:
(a) Unlike charges attract, like charges repel.
(b) Unlike charges repel, like charges attract,
(c) Unlike charges attract, like charges attract.
(a) Unlike charges attract, like charges repel.
- If two negatively charged bodies are brought into close proximity, the force between the two bodies will:
(a) increase
(b) decrease
(c) stay the same
(a) increase
- If you reduce the distance between 2 charged bodies by half, the force of attraction or repulsion will:
(a) Increase by a factor of 2.
(b) Increase by a factor of 4.
(c) Decrease by a factor of 2
(b) Increase by a factor of 4.
- Two charged objects, which are separated by a distance of 10 meters have a repulsive force of 10 Newtons. What is the force between them if the distance is reduced to 5 meters?
(a) 2.5 N Repulsive
(b) 20 N Repulsive
(c) 40 N Repulsive
(c) 40 N Repulsive
- Which of following actions describes the easiest way to accumulate a static electric charge?
(a) Friction between two conductors
(b) Friction between two insulators
(c) Pressure between two conductors
(d) Pressure between two insulators
(b) Friction between two insulators
The three ways of placing static charge are through:
Friction
Contact - physically touching off a charged object
Induction - ‘‘Luring’’ charge to one side of an object and then removing its balancing charged particles (boat whale example in class)
If two positively charged bodies are moved further away from each other, the force between the two bodies will:
(a) increase
(b) decrease
(c) stay the same
(b) decrease
- How do “like” and “unlike” charges react to one another?
(a) Unlike charges repel each other, like charges repel each other
(b) Unlike charges attract each other, like charges attract each other
(c) Unlike charges repel each other, like charges attract each other
(d) Unlike charges attract each other, like charges repel each other
(d) Unlike charges attract each other, like charges repel each other
- Creating a charge by electrostatic induction would occur if:
(a) Uncharged bodies are brought into close proximity.
(b) Two charged items are brought into contact
(c) A charged item is brought into close proximity to an uncharged item.
(c) A charged item is brought into close proximity to an uncharged item.
'’Induction charging is a method used to charge an object without actually touching the object to any other charged object.’’
- Electrostatic lines of force are drawn in which of the following manners?
(a) Entering negative charge, entering positive charge
(b) Entering negative charge, leaving positive charge
(c) Leaving negative charge, leaving positive charge
(d) Leaving negative charge, entering positive charge
(b) Entering negative charge, leaving positive charge
'’Flow is from positive to negative’’
- Electrostatic charge distribution on charged metallic plates would be greatest at the:
(a) extremities
(b) broadest section
(c) Narrowest section.
(a) extremities
'’That is, it will discharge the static electricity from the extremities of the aircraft, such as the wing tips, horizontal stabilizer, vertical stabilizer, antenna, propeller tips etc
- You can create a static charge on a body by:
(a) Friction, heat, pressure.
(b) Induction, expansion, touching.
(c) Friction, touching, induction.
(c) Friction, touching, induction.
The three ways of placing static charge are through:
Friction
Contact - Physically touching off a charged particle
Induction - ‘‘luring’’ charge to one side of an object and then removing its balancing charged particles
- On a sphere, the static charge is
(a) Concentrated around the diameter of the sphere.
(b) Concentrated around the poles of the sphere.
(c) Concentrated uniformly around the surface of the sphere.
(c) Concentrated uniformly around the surface of the sphere.
- The amount of static electricity generated on an aircraft would be greatest:
(a) on cold wet days
(b) on warm dry days
(c) at night time
(b) on warm dry days
- On a flat, square object the static charges are concentrate;
(a) Along the diagonal of the square.
(b) At the corners of the square,
(c) Along one sharp edge of the square.
(b) At the corners of the square,
- Copper is a good conductor because:
(a) Of the large number of free protons available.
(b) Of the small number of free electrons available,
(c) Of the large number of covalent bonds.
(b) Of the small number of free electrons available,
- The presence of ions in a liquid make it;
(a) Freeze quickly,
(b) A good insulator,
(c) A good conductor
(c) A good conductor
'’The more ions that are present, the higher the conductivity of water. Likewise, the fewer ions that are in the water, the less conductive it is’’
- An element could be considered to be a conductor if it has
(a) a large number of electrons
(b) a large number of electrons in its outer orbit
(c) a small number of electrons in its outer orbit
(c) a small number of electrons in its outer orbit
'’The lower the number of electrons in the outer shell, the more readily it will give them up’’
Conductor has 3 or less electrons in its outer shell
Semi-conductor has 4 electrons in its outer shell
Insulator has 5-8 electrons in its outer shell
- An electric current is a flow of
(a) electrons from a positively charged area to a negatively charged area
(b) protons from a positively charged area to a negatively charged area
(c) electrons from a negatively charged area to a positively charged area
(c) electrons from a negatively charged area to a positively charged area
'’Electrons flow from negative to positive’’
Which of the following actions describes the easiest way to accumulate a static electric charge?
(a) Friction between two conductors
(b) Friction between two insulators
(.c) Pressure between two conductors
(b) Friction between two insulators
You can create a static charge on a body by:
(a) Friction, heat, pressure
(b) Induction, expansion, touching
(.c) Friction, touching, induction
(.c) Friction, touching, induction
(.c) A charged item is brought into close proximity to an uncharged item
(.c) Concentrated uniformly around the surface of the sphere
(a) unlike charges attract, like charges repel
(b) Entering negative charge, leaving positive charge
(b) decrease
© Decrease by a factor of 4
© 40 N Repulsive
(b) on warm dry days
the stripping of electrons from one body and depositing them on another
Siemens
5 amps
Note: 1 Coulomb = 1 amp / 1 second
10 Coulombs = 10 amps / 2 seconds → 5 amps
- If you reduce the distance between 2 charged bodies by 1/3 , the force of attraction or repulsion will:
(a) Increase by a factor of 3.
(b) Increase by a factor of 9.
(c) Decrease by a factor of 3
(b) Increase by a factor of 9.
