Science Test on Batteries and Circuits
2 years ago
morham
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20 QuestionsShow answers
  • Question 1
    120 seconds
    Q. In a simple series circuit, why does a bulb light when you close the switch?
    answer choices
    because the switch produces electricity
    because closing the switch completes the circuit
    because closing the switch breaks the circuit
  • Question 2
    120 seconds
    Q. In a simple series circuit, why does the bulb go out when you close the switch?
    answer choices
    because the battery goes flat
    because opening the switch breaks the circuit
    because too much electricity flows through the bulb
  • Question 3
    120 seconds
    Q. Imagine a simple series circuit with one 1.5V battery and one bulb. When the 1.5V battery is replaced with a 3V battery...
    answer choices
    The bulb gets brighter
    the bulb gets dimmer
    the bulb stays at the same level of brightness
  • Question 4
    120 seconds
    Q. Imagine a circuit with a 1.5V battery and one bulb. Imagine a smaller circuit with a 3V battrty and 2 bulbs. Which one has brighter bulbs.
    answer choices
    the circuit with a 1.5V battery and one bulb
    the circuit with 3V battery amd two bulbs
    the bulbs in both circuits are one similar brightness levels
  • Question 5
    120 seconds
    Q. Why might a bulb flash and go out when a 1.5V battery and 3V battery are both connected across it in a simple series circuit?
    answer choices
    There is not enough electricity flowing around the circuit
    too much electricity flows through the bulb's filament and the bulb blows 
    the batteries are flat
  • Question 6
    120 seconds
    Q. What is the effect of changing the wire in a circuit from a straight thick wire to a straight thin wire?
    answer choices
    the bulbs become dimmer
    the bulbs become brighter
    the bulbs stay at the same level of brit
  • Question 7
    120 seconds
    Q. What is the effect of changing the wire in a circuit from a straight thick wire to a longer (coiled) thick wire?
    answer choices
    the bulbs become dimmer
    the bulbs become brighter
    the bulbs stay at the same level of brightness
  • Question 8
    120 seconds
    Q. In a circuit diagram, what does a circle with a cross inside it represent?
    answer choices
    a motor
    a battery
    a light bulb
  • Question 9
    120 seconds
    Q. What do the long straight lines represent in a circuit diagram?
    answer choices
    motors
    light bulbs
    wires
  • Question 10
    120 seconds
    Q. How does a battery represented in a circuit diagram?
    answer choices
    a circle with a cross inside it
    a circle with an M inside it
    a long line and a short line
  • Question 11
    120 seconds
    Q. A material that lets electricity pass through it is called...?
    answer choices
    an electrical conductor
    an electrical insulator
    an electrical appliance
  • Question 12
    120 seconds
    Q. A matireal that does NOT let electricity to pass through it is called...?
    answer choices
    an electrical conductor
    an electrical insulator
    and electrical appliance
  • Question 13
    120 seconds
    Q. Which is the following materials is an electrical conductor?
    answer choices
    silver
    silver-colored plastic
    cork
  • Question 14
    120 seconds
    Q. Which of the following materials is an electrical insulator?
    answer choices
    aluminum
    gold
    rubber
  • Question 15
    120 seconds
    Q. in which circuit willl the bulb or bulbs glow brightest?
    answer choices
    a simple circuit with one bulb and one battery
    a simple circuit with one bulb and two batteries
    a simple circuit with two bulbs and one battery
  • Question 16
    120 seconds
    Q. Why is the bulb brighter when it is powered by two batteries rather than one?
    answer choices
    because the flow of electricity in the circuit is less
    because the flow of electricity in the circuit is the same 
    because the flow of electricity in the circuit is greater
  • Question 17
    120 seconds
    Q. Ruby has connected two bulbs across two batteries in a simple circuit. How can she make the bulbs dimmer?
    answer choices
    replace one of the batteries with a section of wire
    replace one of the batteries with a cork
    replace one of the bulbs with a section of wire
  • Question 18
    120 seconds
    Q. Ruby makes a complete simple circuit with one bulb and three batteries. The bulb lights for an instant and then goes out. Why?
    answer choices
    not enough electricity flows around the circuit
    too much electricity flows through the bulbs filament
    the batteries are flat
  • Question 19
    120 seconds
    Q. why is electrical wiring usually made from copper?
    answer choices
    because copper is shiny
    because copper conducts electricity
    because copper is not magnetic
  • Question 20
    120 seconds
    Q. Why is electrical wiring usually covered with a layer of plastic?
    answer choices
    to make it look pretty
    to help electricity flow along the wire
    to make it safe
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