Q.1
Electric current that flows in only one direction.
  • Voltage
  • Direct Current
  • Alternating Current
  • Series Circuit
Q.2
A closed path that electric current follows
  • Voltage
  • Current
  • Resistance
  • Circuit
Q.3
Kirchhoff's junction rule is a reflection of
  • Conservation of current density vector
  • Conservation of charge and no accumulation of charge at the the junction
  • the momentum with which a charged particle approaches a junction is unchanged as the charged particle leaves the junction
  • Conservation of energy
Q.4
------ is called the increase in resistance per unit original resistance per degree kelvin rise of temperature
  • Thermal velocity
  • temperature coefficient of electrical resistivity
  • temperature coefficient of electrical resistance
  • conducance
Q.5
A __________opens and closes a circuit?
  • keykey
  • magnet
  • switch
  • electromagnet
Q.6
What type of cell is necessary to make solar cells practical?
  • primary cells
  • storage cells
  • none exist that can hold that much energy
  • All of above
Q.7
What is a dry cell battery
  • one that uses water to make electricity
  • one that uses a liquid electrolyte solution
  • one that uses a paste electrolyte
  • All of above
Q.8
What is a wet cell battery?
  • one that uses water to make electricity
  • one that uses a liquid electrolyte solution
  • one that uses a powdered electrolyte solution
  • All of above
Q.9
What is a storage cell?
  • a one-use source of electrical energy
  • a re-chargeable source of electrical energy
  • a one-use source of solar electricity
Q.10
What is a primary cell?
  • a one-use source for electrical charge
  • a re-usable source for electrical charge
  • a device to change sunlight into electrical charge
  • a one-use source for sunlight to power flashlights
Q.11
Why are humans conductors?
  • Humans are made of mostly water.
  • Humans have a ton of metal in their bodies.
  • Humans conduct the railroad.
  • Humans are great at the electric slide.
Q.12
What is an electric cell?
  • a device that converts mechanical energy into electrical energy
  • a device that turns stored chemical energy into electrical energy
  • a device that devours electrical energy
  • a device that converts static electricity into mechanical energy
Q.13
Insulator or Conductor?STYROFOAM
  • Insulator
  • Conductor
Q.14
What is the unit we use to measure electric current?
  • ampere (amp)
  • ohm
  • volt
  • newton
Q.15
Insulator or Conductor?STEEL
  • Insulator
  • Conductor
Q.16
How does electric current flow?
  • from lower charge to higher charge
  • from higher charge to lower charge
Q.17
What is an electric current?
  • a build up of electrons
  • the difference in charge between 2 points
  • the flow of electrons over a circuit
  • the opposition to flow of electrons
Q.18
What happens to the brightness of the light bulbs in a series circuit when you add more lights.
  • Each bulb gets dimmer
  • Each bulb remains the same
  • Half of the bulbs get dimmer
  • Each bulb gets brighter
Q.19
What effect do like (similar) charges have on each other?
  • They attract
  • They repel
  • No effect
  • They reverse each other
Q.20
True or False: Conductors allow electrons to pass through easily.
  • True
  • False
Q.21
What kind of energy is the electricity transferred into in a toaster?
  • sound
  • light
  • heat
  • light and heat
Q.22
What is the purpose of a switch?
  • To open and close the circuit.
  • To carry the electricity through the circuit.
  • To make a fun clicking sound
  • To supply the power to the circuit
Q.23
What are the components of a simple circuit?
  • wires, switch, outlet
  • battery, switch, motor
  • wires, light bulb, motor
  • wires, battery, light bulb
Q.24
What is the difference between a conductor and an insulator?
  • An insulator allows electricity to flow through it easily and a conductor does not
  • A conductor allows electricity to flow through it easily and an insulator does not.
  • An insulator is magnetic and a conductor is not
  • A conductor is magnetic and an insulator is not
Q.25
An example of an insulator is:
  • iron
  • silver
  • copper wire
  • rubber
Q.26
An example of a conductor is :
  • a glass paperweight
  • a plastic cap
  • a metal screw
  • a wooden handle
Q.27
The flow of electricity in a circuit-
  • current
  • flow
  • circuit
Q.28
The flow of electricity requires a
  • complete path
  • incomplete path
  • insulated current
  • All of above
Q.29
If the lights are off, the circuit is
  • closed
  • open
Q.30
If the lights are on, the circuit is
  • closed
  • open
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