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12th Standard English Medium Physics Subject Electrostatics Creative 1 Mark Questions with Solution Part - I

12th Standard

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Physics

Time : 00:30:00 Hrs
Total Marks : 5
    5 x 1 = 5
  1. The electrostatic force obeys _______.

    (a)

    Newton's I law

    (b)

    Newton's II law

    (c)

    Newton's III law

    (d)

    none of the above

  2. The value of constant 'K' in coulomb law is _____________.

    (a)

    0.9 x 109 Nm2 C2

    (b)

    9 x 10-9 Nm2C2

    (c)

    9 x 109 Nm-2 C-2

    (d)

    9 x 109 Nm2 C-2

  3. The relative permittivity of water is _______.

    (a)

    ε= 70

    (b)

    ε= 75

    (c)

    ε= 80

    (d)

    ε= 85

  4. The figure shows tow parallel equipotential surface A and B kept at a small distance 'r' a part from each other. A point change of Q coulomb is taken from the surface A to B. The amount of net work done will be 

    (a)

    \(W=\frac { -1 }{ 4\pi { \varepsilon }_{ 0 }r } \frac { q }{ r } \)

    (b)

    \(W=\frac { 1 }{ 4\pi { \varepsilon }_{ 0 }r } \frac { q }{ r } \)

    (c)

    \(W=\frac { -1 }{ 4\pi { \varepsilon }_{ 0 }r } \frac { q }{ r^2 } \)

    (d)

    zero

  5. An uncharged metal sphere is placed between two equal and oppositely charged metal plates. The nature of lines of force will be ______________

    (a)

    (b)

    (c)

    (d)

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