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Electrostatics

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Electric Charges and Fields

Subtopic

Electric Charges and Fields under Electrostatics for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the nature of electric field lines for an isolated negative point charge?

    A.

    Circular and clockwise

    B.

    Radially outward

    C.

    Parabolic

    D.

    Radially inward

  2. 2.

    Which of the following is the correct SI unit for electric dipole moment?

    A.

    C/mC/m

    B.

    C⋅m2C \cdot m^2

    C.

    C⋅mC \cdot m

    D.

    N/CN/C

  3. 3.

    The electrostatic force between two point charges is FF when they are separated by a distance rr. If the distance between them is tripled, the new force will be:

    A.

    3F3F

    B.

    F/3F/3

    C.

    F/9F/9

    D.

    9F9F

Download the worksheet for Electrostatics - Electric Charges and Fields to practice offline. It includes additional chapter-level practice questions.

Gauss's Theorem

Subtopic

Gauss's Theorem under Electrostatics for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The electric field intensity EE near an infinite thin non-conducting plane sheet of charge with surface charge density σ\sigma is given by:

    A.

    E=σ/ϵ0E = \sigma / \epsilon_0

    B.

    E=σ/2ϵ0E = \sigma / 2\epsilon_0

    C.

    E=2σ/ϵ0E = 2\sigma / \epsilon_0

    D.

    E=σ/4ϵ0E = \sigma / 4\epsilon_0

  2. 2.

    If the radius of a Gaussian spherical surface enclosing a charge is doubled, the net electric flux through the surface will:

    A.

    Be doubled

    B.

    Be quadrupled

    C.

    Remain the same

    D.

    Become half

  3. 3.

    A point charge qq is placed at the center of a cube of side LL. The electric flux through one face of the cube is:

    A.

    q/ϵ0q/\epsilon_0

    B.

    q/2ϵ0q/2\epsilon_0

    C.

    q/4ϵ0q/4\epsilon_0

    D.

    q/6ϵ0q/6\epsilon_0

Download the worksheet for Electrostatics - Gauss's Theorem to practice offline. It includes additional chapter-level practice questions.

Electrostatic Potential

Subtopic

Electrostatic Potential under Electrostatics for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The relationship between electric field intensity E⃗\vec{E} and electric potential VV is expressed as:

    A.

    E=dVdrE = \frac{dV}{dr}

    B.

    E=−dVdrE = -\frac{dV}{dr}

    C.

    V=−dEdrV = -\frac{dE}{dr}

    D.

    E=−∫VdrE = -\int V dr

  2. 2.

    The electric potential at a point inside a hollow charged spherical conductor of radius RR is:

    A.

    Zero

    B.

    Constant and equal to the potential at the surface

    C.

    Varying linearly with the distance from the center

    D.

    Inversely proportional to the square of the distance from the center

  3. 3.

    What is the work done in moving a test charge q0q_0 between two points on an equipotential surface of potential VV?

    A.

    q0Vq_0 V

    B.

    V/q0V / q_0

    C.

    Zero

    D.

    2q0V2 q_0 V

Download the worksheet for Electrostatics - Electrostatic Potential to practice offline. It includes additional chapter-level practice questions.

Capacitors and Dielectrics

Subtopic

Capacitors and Dielectrics under Electrostatics for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following expressions represents the energy stored in a capacitor of capacitance CC when it is charged to a potential difference VV?

    A.

    12CV\frac{1}{2} CV

    B.

    CV2CV^2

    C.

    12C2V\frac{1}{2} C^2 V

    D.

    12CV2\frac{1}{2} CV^2

  2. 2.

    An isolated parallel plate capacitor is charged and then disconnected from the battery. If a dielectric slab of dielectric constant KK is then inserted to completely fill the gap, what happens to the energy stored in the capacitor?

    A.

    It increases by a factor of KK

    B.

    It decreases by a factor of KK

    C.

    It remains unchanged

    D.

    It becomes zero

  3. 3.

    The SI unit of capacitance, the Farad (FF), can be expressed in terms of fundamental units as:

    A.

    Coulomb per Volt

    B.

    Joule per Coulomb

    C.

    Volt per Coulomb

    D.

    Newton per Meter

Download the worksheet for Electrostatics - Capacitors and Dielectrics to practice offline. It includes additional chapter-level practice questions.

Electrostatics - ICSE Class 12 Physics Notes & Revision | Krit.club