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Electric Current and its Effects Test - 1

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Electric Current and its Effects Test - 1
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Fuse wire is made up of alloys of

    Solution

    Explanation:

    Fuse wire is made up  of an  alloy of tin and lead with a very low melting point.This fuse wire melt quickly and break when large  electric currents are passed through them  

     

  • Question 2
    1 / -0

    Electric current is measured by a device

    Solution

    Explanation:

    An ammeter is a device which is used to measure the amount of current flowing through a circuit.. It is always connected in series.

     

  • Question 3
    1 / -0

    Electromagnet is used in

    Solution

    Explanation:

    An electric bell contains an electromagnet, consisting of coils of insulated wire wound round iron rods. When an electric current flows through the coils, the rods become magnetic and attract a piece of iron attached to a clapper. The clapper hits the bell and makes it ring.

     

  • Question 4
    1 / -0

    MCB in electric circuit stand for

    Solution

    Explanation:

    Miniature Circuit Breaker (MCB) is a kind of switch that automatically turns off in the case of short circuit or overloading of current. 

     

  • Question 5
    1 / -0

    A ____________ is used in torches.

    Solution

    Explanation:

    A dry cell is a type of battery used for portable electrical devices such as torches,radios,TV remote controls etc.

     

  • Question 6
    1 / -0

    Electric current is said to be pass through a wire when

    Solution

    Explanation:

    The flow of electrons through a conductor (such as metal wire) gives rise to electric current. 

     

  • Question 7
    1 / -0

    Filament of electric bulb is made up of

    Solution

    Explanation:

    Filament of electric bulb is made up of tungsten wire, an alloy of metals having very high melting point.

     

  • Question 8
    1 / -0

    Electromagnet is based on

    Solution

    Explanation:

    Electromagnet is a magnet that works as magnet in presence of current only. It is based on magnetic effect of electric current.

     

  • Question 9
    1 / -0

    Electrons are ___________ particles.

    Solution

    Explanation:

    Electrons are negatively charged particles. Charge of an electron is 1.60217662 × 10-19 coulombs. For calculation purpose  we use 1.6× 10-19 coulombs.Electrons revolve around in nucleus in a definte path called as orbitsElectrons play an essential role in physical phenomena such as electricity, magnetism and thermal conductivity.They also participate in gravitational,electromagnetic and weak interactions.

     

  • Question 10
    1 / -0

    When two or more cells are joined together it forms a

    Solution

    Explanation:

    When we connect two or more cells in such a way that the positive terminal of one cell is connected to the negative terminal of the next cell,such a combination of two or more cells is called a battery 

     

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