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Work and Energy Test - 1

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Work and Energy Test - 1
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Which of the following store(s) the chemical energy in an electric cell?

    Solution

    Plates are kept inside a chemical called electrolyte, which stores the chemical energy .

     

  • Question 2
    1 / -0

    The dark grey granular powder inside a cell is a mixture of ___________ and carbon particles.

    Solution

    This is the correct option. The dark grey granular powder inside a cell is a mixture of manganese dioxide and carbon particles.

     

  • Question 3
    1 / -0

    The filament of a torch bulb is fixed to two thicker wires. One thick wire is connected to the ________ and the other thick wire is connected to the ___________.

    Solution

    One thick wire is connected to the metal case at the base of the bulb and the other thick wire is connected to the metal tip at the centre of the base.

     

  • Question 4
    1 / -0

    The handles of the tools like pliers used by electricians for repair work usually have plastic covers on them. What is/are the reason(s) for this?

    (a) Because plastic is a good conductor of heat
    (b) Because plastic is a good conductor of electricity
    (c) Because plastic is a bad conductor of electricity

    Solution

    Plastic is a bad conductor of electricity, therefore it can be used on handles of pliers used by electricians for repair work and they don't get shock when in operation.

     

  • Question 5
    1 / -0

    In a voltaic cell, _____________ energy is converted into electrical energy.

    Solution

    In a voltaic cell, the chemical energy produced due to the reactions between the electrolyte and electrode is converted into the electrical energy.

     

  • Question 6
    1 / -0

    Which of the following sets of materials represents insulators?

    Solution

    Wood, plastic and porcelain are insulators as they do not allow the electric current to pass through them and are mostly used for safety purposes.

     

  • Question 7
    1 / -0

    Which of the following is a bad conductor of electricity?

    Solution

    Air is a bad conductor of electricity because it does not have free electrons to conduct electricity.

     

  • Question 8
    1 / -0

    Which of the following is/are the correct reason(s) for using tungsten in an incandescent bulb?

    Solution

    Yes, because of a very high melting point, tungsten is used as a filament in an incandescent bulb.

     

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