Abeka 9th grade Science: Matter and Energy Test 9 || 100% Exact
Answers.
What early device was developed to store electric charge? correct answers Leyden jar
What is the general term for a device that transforms the energy of an electric current into
another useful form of energy? correct answers load
What is the SI unit of resistance? correct answers ohm
What device consists of one or more electrochemical cells connected in series to produce a single
source of current? correct answers battery
What device converts pulses of electricity into sound waves? correct answers loudspeaker
What communication device uses electromagnets to reproduce messages by means of audible
clicks? correct answers telegraph
What is a material that allows current to flow through it with no resistance? correct answers
superconductor
Who built the first electrostatic generator? correct answers Otto von Guericke
What is the transfer of electric charge by direct contact between objects correct answers
conduction
What do the lines of flux demonstrate in the image below? correct answers The magnets have
unlike poles near each other
, What device converts absorbed sunlight directly into electricity? correct answers photovoltaic
cell
What type of generator works by passing a conducting fluid through a magnetic field? correct
answers magnetohydrodynamic generator
What is an electric field with even strength throughout? correct answers uniform field
What is the method of magnetism in which an object is permanently magnetized by stroking a
magnet against the object? correct answers magnetizing by contact
What is a semiconductor device that produces light when a direct current is applied? correct
answers light-emitting diode
What is the line connecting all points where a compass needle points true north? correct answers
agonic line
What is the imaginary line that circles Earth halfway between the two magnetic poles? correct
answers magnetic equator
What is the final attraction force between two charged objects when the distance is reduced to
1/5 of the original distance? correct answers 25 times the original force
What is a small, relatively inexpensive computer designed for use by one user at a time? correct
answers personal computer
What is a large, extremely powerful computer designed for rapidly performing complex
calculations? correct answers supercomputer
Answers.
What early device was developed to store electric charge? correct answers Leyden jar
What is the general term for a device that transforms the energy of an electric current into
another useful form of energy? correct answers load
What is the SI unit of resistance? correct answers ohm
What device consists of one or more electrochemical cells connected in series to produce a single
source of current? correct answers battery
What device converts pulses of electricity into sound waves? correct answers loudspeaker
What communication device uses electromagnets to reproduce messages by means of audible
clicks? correct answers telegraph
What is a material that allows current to flow through it with no resistance? correct answers
superconductor
Who built the first electrostatic generator? correct answers Otto von Guericke
What is the transfer of electric charge by direct contact between objects correct answers
conduction
What do the lines of flux demonstrate in the image below? correct answers The magnets have
unlike poles near each other
, What device converts absorbed sunlight directly into electricity? correct answers photovoltaic
cell
What type of generator works by passing a conducting fluid through a magnetic field? correct
answers magnetohydrodynamic generator
What is an electric field with even strength throughout? correct answers uniform field
What is the method of magnetism in which an object is permanently magnetized by stroking a
magnet against the object? correct answers magnetizing by contact
What is a semiconductor device that produces light when a direct current is applied? correct
answers light-emitting diode
What is the line connecting all points where a compass needle points true north? correct answers
agonic line
What is the imaginary line that circles Earth halfway between the two magnetic poles? correct
answers magnetic equator
What is the final attraction force between two charged objects when the distance is reduced to
1/5 of the original distance? correct answers 25 times the original force
What is a small, relatively inexpensive computer designed for use by one user at a time? correct
answers personal computer
What is a large, extremely powerful computer designed for rapidly performing complex
calculations? correct answers supercomputer
