• Zigya Logo

    Electric Charges and Fields
    pdf download
    Electrostatic forces are much stronger than gravitational forces. Give one example.
    Indeed, electrostatic forces are much stronger than the graviattional forces. for instance, a charged glass rod can lift a piece of paper against the gravitational pull of the earth on the paper.
    673 Views
    Answer
    Find the amount of work done in rotating a dipole of dipole moment 3 x 10–3 cm from its position of stable equilibrium to the position of unstable equilibrium, in a uniform electric field of intensity 104 NC–1.
    In rotating the dipole from the position of stable equilibrium by an angle θ, the amount of work done,
                  W = PE(1-cos θ)

    For unstable equilibrium θ = 180°

    ∴                  W =  PE(1-cos 180°) [cos 180°=-1]   
                              = 2 PE
                              =2×3×10-3×104J= 60 J.
    2841 Views
    Answer
    At what points, dipole field intensity is parallel to the line joining the charges? 
    The dipole field intensity is parallel to the line joining the charges at points on the axial line or equatorial line of dipole.
    1583 Views
    Answer
    How is force between two charges affected when dielectric constant of the medium in which they are held increases?
    As F = F0/K, therefore, force decreases, when K increases.
    Dielectric constant and force are inversely proportional to each other.
    679 Views
    Answer
    Advertisement
    Zigya App

    Can a charged body attract another uncharged body? Explain.

    Yes, a charged body can attract another uncharged body. When the charged body is placed near the uncharged body, the induced charges of opposite kind are produced on the uncharged body by the charged body. Now, they are oppositely charged and the uncharged body is attracted by charged body.
    898 Views
  • Switch
    • Advertisement
    Advertisement
    Flag Popup Icon
    Flag it
    Submit
    Flag Popup Icon
    Switch to
  • Type
  • Category
    • flexipad
    Share It Icon
    Share it
    Share It
    Share it