PDF Notes: Electric Charges and Fields Class 12 Physics Notes - Free PDF

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    What is electric charge?

    It produces electrical and magnetic effects.

    What are the two types of electric charges?

    Positive and negative charges.

    What is the S.I. unit of charge?

    Coulomb (C).

    What is a point charge?

    Its size is negligible compared to other distances.

    How does charge behave when two like charges are brought together?

    They repel each other.

    What happens when a charged body contacts an uncharged body?

    Electrons transfer, charging the uncharged body.

    What is the conservation of charge?

    Charge cannot be created or destroyed.

    How does charge relate to mass?

    Charge always exists with mass, but mass can exist without charge.

    What is quantization of charge?

    Charge can only take discrete values, like multiples of the electron charge.

    How does electric charge differ from mass?

    Charge can be positive, negative, or zero; mass is always positive.

    What is Coulomb's Law?

    It describes the force between two point charges.

    What does Coulomb's Law state about the force between charges?

    It is attractive for opposite charges and repulsive for like charges.

    What is the effect of a dielectric medium on charge interaction?

    It decreases the force between charges by a factor known as dielectric constant.

    What is the principle of superposition in electric forces?

    The total force on a charge is the vector sum of individual forces from other charges.

    What defines electric field intensity?

    The force experienced by a unit positive charge at a point.

    What is the S.I. unit of electric field intensity?

    Newton per coulomb (N/C).