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Fields

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

Gravitational Fields

Subtopic

Gravitational Fields under Fields for Grade 12 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Planet Alpha has mass MM and radius RR. Planet Beta has mass 2M2M and radius 2R2R. If the gravitational field strength on the surface of Alpha is gg, what is the gravitational field strength on the surface of Beta?

    A.

    gg

    B.

    0.5g0.5g

    C.

    2g2g

    D.

    0.25g0.25g

  2. 2.

    A mass mm is moved along a path between two points, X and Y, which are both located on the same equipotential surface of a spherical planet. Which statement about the work done by the gravitational field is correct?

    A.

    The work done depends on the length of the path taken between X and Y.

    B.

    The work done is equal to the change in kinetic energy only.

    C.

    The work done is maximum if the path is a straight line.

    D.

    The work done is zero regardless of the path taken.

  3. 3.

    The gravitational field strength at the surface of a planet of radius RR is gg. What is the gravitational field strength at a height RR above the surface of the planet?

    A.

    g/4g / 4

    B.

    g/2g / 2

    C.

    g/9g / 9

    D.

    2g2g

Download the worksheet for Fields - Gravitational Fields to practice offline. It includes additional chapter-level practice questions.

Electrostatic Fields

Subtopic

Electrostatic Fields under Fields for Grade 12 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In a uniform electric field with strength EE, what is the potential difference VV between two points separated by a distance dd along the field lines?

    A.

    V=E⋅dV = E \cdot d

    B.

    V=EdV = \frac{E}{d}

    C.

    V=dEV = \frac{d}{E}

    D.

    V=E⋅d2V = E \cdot d^2

  2. 2.

    Which of the following statements correctly describes the direction of electric field lines?

    A.

    They point from low potential to high potential.

    B.

    They are always parallel to equipotential surfaces.

    C.

    They point away from positive charges and toward negative charges.

    D.

    They point toward positive charges and away from negative charges.

  3. 3.

    Two point charges are separated by a distance rr. If the distance between them is increased to 3r3r, by what factor does the electrostatic force between them change?

    A.

    3

    B.

    9

    C.

    13\frac{1}{3}

    D.

    19\frac{1}{9}

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

Magnetic Fields

Subtopic

Magnetic Fields under Fields for Grade 12 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Lenz's Law, which states that the direction of an induced electromotive force (EMF) is such that it opposes the change in magnetic flux that created it, is a specific manifestation of which fundamental principle?

    A.

    Conservation of Momentum

    B.

    Conservation of Energy

    C.

    Conservation of Charge

    D.

    Newton's Third Law

  2. 2.

    Which of the following is the SI unit for magnetic flux linkage?

    A.

    Tesla (TT)

    B.

    Newton per Ampere (NA−1N A^{-1})

    C.

    Weber per square meter (Wbm−2Wb m^{-2})

    D.

    Weber (WbWb)

  3. 3.

    A proton moves with a velocity vv in a uniform magnetic field of strength BB. If the velocity vector is parallel to the magnetic field lines, what is the magnitude of the magnetic force acting on the proton?

    A.

    00

    B.

    qvBqvB

    C.

    qvBsin⁡(90∘)qvB \sin(90^{\circ})

    D.

    mv2r\frac{mv^2}{r}

Download the worksheet for Fields - Magnetic Fields to practice offline. It includes additional chapter-level practice questions.

Electromagnetic Induction

Subtopic

Electromagnetic Induction under Fields for Grade 12 IB.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    According to Faraday's law of induction, the magnitude of the induced electromotive force (EMF) in a circuit is proportional to which of the following?

    A.

    The total magnetic flux linkage

    B.

    The rate of change of magnetic flux linkage

    C.

    The resistance of the circuit

    D.

    The magnetic field strength only

  2. 2.

    A flat coil with an area of 0.050 m20.050\text{ m}^2 is placed in a uniform magnetic field of 0.20 T0.20\text{ T}. If the magnetic field lines are perpendicular to the plane of the coil, what is the magnetic flux through the coil?

    A.

    0.010 Wb0.010\text{ Wb}

    B.

    0.040 Wb0.040\text{ Wb}

    C.

    4.0 Wb4.0\text{ Wb}

    D.

    0.10 Wb0.10\text{ Wb}

  3. 3.

    Lenz's law states that the direction of an induced current is such that it produces a magnetic field that opposes the change in magnetic flux that created it. This law is a direct consequence of which fundamental principle?

    A.

    Conservation of Momentum

    B.

    Conservation of Charge

    C.

    Conservation of Energy

    D.

    Conservation of Mass

Download the worksheet for Fields - Electromagnetic Induction to practice offline. It includes additional chapter-level practice questions.

Fields - IB Grade 12 Physics Notes & Revision | Krit.club