Solar Power Systems || with 100% Verified Solutions.
In the NORTHERN HEMISPHERE solar panels have to face... correct answers ...SOUTH (so
they will be on the right side roof of the VI)
photovoltaic correct answers light and electricity/voltage. Solar power systems are photovoltaic
devices.
Energy is... correct answers ...the capacity for doing work. You must have energy to accomplish
work.
Work is... correct answers ...an activity that involves the application of energy → you need 100
joules of energy to do 100 joules of work
Power is... correct answers ...the rate at which you are doing or expending energy
Electricity correct answers the flow of ions/charged particles; electrons moving towards protons.
Ions seek balance.
Conductors correct answers metals (silver, gold, and copper) that allow the free flow of electrons
to produce electricity
Insulators correct answers non-metals (porcelain, rubber, air, and materials with tight particles)
that prohibit the production of electricity
Semiconductors correct answers insulation materials mixed with a conducting material to control
the flow of electrons (example of use = computer chips, etc.)
Static electricity correct answers ...electricity that is waiting to find a conductor (which is why
you get shocked when you touch a metal doorknob, etc.)
What are the two kinds of electricity? correct answers alternating current and direct current
alternating current correct answers the kind of electricity we use in our homes, etc. (electrons
move back and forth)
direct current correct answers electrons move only one way
Why are we so dependent on fossil fuels? correct answers We are very dependent on fossil fuels
because they have high energy content (or a high energy density).
In what field of electromagnetic waves is solar power? correct answers Both the electrical and
magnetic fields of the electromagnetic waves that comprise light. The energy associated with
electric currents is also electromagnetic energy field energy, in this case in fields that surround
conducting wires→ that is what we are referring to when we refer to "electricity."
, energy carrier correct answers a form of energy that we generate from a true energy source and
then deliver for our end uses
Electricity is easy to... correct answers convert (it is energy of the highest thermodynamic
quality) and easy to transport (a thin conducting wire allows it to travel at the speed of light)
What is another energy carrier in the chemical form of H₂? correct answers hydrogen
Two energy carriers are... correct answers electricity and hydrogen. While both are naturally
available but need to be produced using other energy sources, otherwise they're very different.
Electricity is electromagnetic energy flowing at nearly the speed of light, while hydrogen is a
storable, transportable, burnable chemical fuel.
Approximately how much of the world's energy is used to generate electricity? How much
actually ends up as electricity? correct answers 36% of the world's primary energy is used to
generate electricity, but inefficiencies and losses mean that we discard as waste some two-thirds
of that 36%. 12% of the world's primary energy ends up as electricity.
interconnected electrical system correct answers electricity from diverse sources can be joined
into a common flow of energy
what is the electrical power grid? correct answers The interconnected electrical system for
different continents. It is a complex interconnection of generators, transmission and distribution
lines and associated equipment, and end users.
what is the equation for finding power? correct answers Voltage x current → (energy/charge) x
(charge/time), which reduces energy/time or power: P = IV (electric power) → applies to any
situation involving electrical power
what is the equation for current? correct answers Voltage-energy per chance-drives currents
because most electrical conductors exhibit resistance (R ) to the flow of current. For a given
voltage across a conductor, a higher resistance results in a lower current, also known as Ohm's
law:
I = V/R
what is the equation for power loss in transmission? correct answers I²R (each wire)
2I²R (both wires)
Ploss = 2I²R = 2 (P/V)²R (power loss [total?])
how do we change voltage levels? correct answers electromagnetic induction
what do we use to change voltage levels? correct answers transformer
what is a step-up transformer? correct answers a transformer whose output voltage is double the
primary voltage
In the NORTHERN HEMISPHERE solar panels have to face... correct answers ...SOUTH (so
they will be on the right side roof of the VI)
photovoltaic correct answers light and electricity/voltage. Solar power systems are photovoltaic
devices.
Energy is... correct answers ...the capacity for doing work. You must have energy to accomplish
work.
Work is... correct answers ...an activity that involves the application of energy → you need 100
joules of energy to do 100 joules of work
Power is... correct answers ...the rate at which you are doing or expending energy
Electricity correct answers the flow of ions/charged particles; electrons moving towards protons.
Ions seek balance.
Conductors correct answers metals (silver, gold, and copper) that allow the free flow of electrons
to produce electricity
Insulators correct answers non-metals (porcelain, rubber, air, and materials with tight particles)
that prohibit the production of electricity
Semiconductors correct answers insulation materials mixed with a conducting material to control
the flow of electrons (example of use = computer chips, etc.)
Static electricity correct answers ...electricity that is waiting to find a conductor (which is why
you get shocked when you touch a metal doorknob, etc.)
What are the two kinds of electricity? correct answers alternating current and direct current
alternating current correct answers the kind of electricity we use in our homes, etc. (electrons
move back and forth)
direct current correct answers electrons move only one way
Why are we so dependent on fossil fuels? correct answers We are very dependent on fossil fuels
because they have high energy content (or a high energy density).
In what field of electromagnetic waves is solar power? correct answers Both the electrical and
magnetic fields of the electromagnetic waves that comprise light. The energy associated with
electric currents is also electromagnetic energy field energy, in this case in fields that surround
conducting wires→ that is what we are referring to when we refer to "electricity."
, energy carrier correct answers a form of energy that we generate from a true energy source and
then deliver for our end uses
Electricity is easy to... correct answers convert (it is energy of the highest thermodynamic
quality) and easy to transport (a thin conducting wire allows it to travel at the speed of light)
What is another energy carrier in the chemical form of H₂? correct answers hydrogen
Two energy carriers are... correct answers electricity and hydrogen. While both are naturally
available but need to be produced using other energy sources, otherwise they're very different.
Electricity is electromagnetic energy flowing at nearly the speed of light, while hydrogen is a
storable, transportable, burnable chemical fuel.
Approximately how much of the world's energy is used to generate electricity? How much
actually ends up as electricity? correct answers 36% of the world's primary energy is used to
generate electricity, but inefficiencies and losses mean that we discard as waste some two-thirds
of that 36%. 12% of the world's primary energy ends up as electricity.
interconnected electrical system correct answers electricity from diverse sources can be joined
into a common flow of energy
what is the electrical power grid? correct answers The interconnected electrical system for
different continents. It is a complex interconnection of generators, transmission and distribution
lines and associated equipment, and end users.
what is the equation for finding power? correct answers Voltage x current → (energy/charge) x
(charge/time), which reduces energy/time or power: P = IV (electric power) → applies to any
situation involving electrical power
what is the equation for current? correct answers Voltage-energy per chance-drives currents
because most electrical conductors exhibit resistance (R ) to the flow of current. For a given
voltage across a conductor, a higher resistance results in a lower current, also known as Ohm's
law:
I = V/R
what is the equation for power loss in transmission? correct answers I²R (each wire)
2I²R (both wires)
Ploss = 2I²R = 2 (P/V)²R (power loss [total?])
how do we change voltage levels? correct answers electromagnetic induction
what do we use to change voltage levels? correct answers transformer
what is a step-up transformer? correct answers a transformer whose output voltage is double the
primary voltage
