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Activity Discussion Science & Technology Electric Current

  • Manpreet

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    June 5, 2021 at 12:12 pm
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    Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.”

    There are two types of electric charges – positive charge and a negative charge. A positive charge generally accounts to a proton whereas a negative charge to an electron.

    An electric charge has a magnitude and direction, yet it is a scalar quantity. A vector quantity has a magnitude and a direction plus it follows the parallelogram law of vector addition and the triangle law of vector addition. Whereas, when two currents meet they won’t be added using vector addition but using algebra. Thus charges, in spite of having both magnitude and direction, are a scalar quantity.

    Unit of charge –

    Unit of charge is Coulomb. It is denoted by the letter ‘C’. “One coulomb is the quantity of charge transferred in one second.”

    It is denoted by the equation :

    Q = n * e

    Where Q = charge, n = integer and e = charge on 1 electron

    <b style=”background-color: transparent; font-family: inherit; font-size: inherit;”>

    <b style=”background-color: transparent; font-family: inherit; font-size: inherit;”>Basic properties of an electric charges are as follows –

    · Charges are additive inn nature –

    Charges can be added using algebra as they are scalar quantities. Consider 4 charges – q1, q2, q3, q4. The total charge = Q = q1 + q2 + q3 + q4.

    · Charges are conserved in nature –

    This simply means that charges can neither be created nor can be destroyed. They are transferred from one body to another.

    · Quantization of charges –

    Charges can be expressed as the integral multiple of the basic unit charge, ‘e’ ( e = charge on 1 electron). Thus charges cannot be fractions or irrational numbers.

    Q = ne

    Where Q = amount of charge, n = integer (not fraction ), e = charge of 1 electron.


    I hope this helps..

    • This reply was modified 1 year, 7 months ago by  Manpreet.
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