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Electricity and Circuits Test - 8

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Electricity and Circuits Test - 8
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Weekly Quiz Competition
  • Question 1
    1 / -0
    A material that lets electricity to pass through it is called a/an:
    Solution
    A material that lets electricity to pass through it is called an electrical conductor.
  • Question 2
    1 / -0
    A potato can be used to find the polarity of a cell
    Solution
    A potato is cut into two halves and the copper wires of a tester are inserted into it.  After half an hour, it was noticed that there was a greenish blue spot on the potato around one wire whereas there was no such spot around the other wire. They found that it was always the wire connected to the positive terminal, which had a greenish blue spot around it. This concept could be used for identifying the positive terminal of a cell or a battery concealed in a box.
    Hence, A potato can be used to find the polarity of a cell and the statement is true.
  • Question 3
    1 / -0
    Which of the follwing does not belong to the group formed by the others?
    Solution
    In the given group, iron, tin and steel are electric conductors while glass is an electric insulator. 

    Hence, glass does not belong to the group formed by others.

    So, option C is correct.
  • Question 4
    1 / -0
    The path of electricity is called:
    Solution
    Current always flows from higher potential to the lower potential in a wire or through the load. The Circuit is the path in which current moves. 
    Circuit is basically the pathway of the current.

    It is analogous to the fact that water flows from higher side to the lower side. Similarly here also,  current moves from higher potential to the lower potential. The push is provided by a battery, just like water is pushed through a water pump. 
  • Question 5
    1 / -0
    A material that does not allow electricity to flow through it is called a/an:
    Solution
    An electrical insulator is a material whose internal electric charges do not flow freely and therefore make it very hard to conduct an electric current under the influence of an electric field.
  • Question 6
    1 / -0
    A material that does not allow electricity to flow through it is called a/an-
    Solution
    An electrical insulator is a material whose internalelectric charges do not flow freely; very little electriccurrent will flow through it under the influence of anelectric field. This contrasts with other materials, semiconductors and conductors, which conductelectric current more easily.
  • Question 7
    1 / -0
    A closed circuit has its every part made of_______

    Solution
    A closed-circuit has every part made up of conducting material.  In order to make the circuit work, the current should pass through every part of the circuit which is possible only when the materials are good conductors of electricity.
  • Question 8
    1 / -0
    Electric current can flow through-

    Solution

  • Question 9
    1 / -0
    Which of the following does not belong to the group formed by the others?
    Solution
    Except wood all are good conductors whereas wood is an insulator.
    Good conductors are those materials that allow electricity to pass through them easily. Bad conductors are those materials that do not allow electricity to pass through them easily.
  • Question 10
    1 / -0
    The main function of a switch is to
    Solution
    A switch is a device that is used for making and breaking electric current in a circuit. It is used to turn on and turn off daily used equipment like television, washing machine, fan, light, etc.
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