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Electricity and Magnetism

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

Simple phenomena of magnetism

Subtopic

Simple phenomena of magnetism under Electricity and Magnetism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which property distinguishes a 'hard' magnetic material from a 'soft' magnetic material?

    A.

    A hard material is more difficult to scratch.

    B.

    A hard material retains its magnetism much longer after the external field is removed.

    C.

    A soft material cannot be magnetized by an electric current.

    D.

    A soft material is always a non-ferrous metal.

  2. 2.

    Two bar magnets are placed near each other as shown in the diagram. What is the nature of the force between the labeled poles?

    A.

    Strong attraction

    B.

    Strong repulsion

    C.

    No magnetic force

    D.

    The magnets will rotate but not move together

  3. 3.

    In which direction do the magnetic field lines point outside a permanent bar magnet?

    A.

    From the South pole to the North pole

    B.

    From the center of the magnet to the poles

    C.

    From the North pole to the South pole

    D.

    In concentric circles around the magnet

Download the worksheet for Electricity and Magnetism - Simple phenomena of magnetism to practice offline. It includes additional chapter-level practice questions.

Electrical quantities

Subtopic

Electrical quantities under Electricity and Magnetism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which equation correctly relates charge (QQ), current (II), and time (tt)?

    A.

    Q=I/tQ = I / t

    B.

    I=Q×tI = Q \times t

    C.

    Q=I×tQ = I \times t

    D.

    t=I×Qt = I \times Q

  2. 2.

    A uniform wire has a resistance RR. If the wire is cut into two equal halves, what is the resistance of each half?

    A.

    R/2R/2

    B.

    RR

    C.

    2R2R

    D.

    R/4R/4

  3. 3.

    What is the SI unit for measuring electromotive force (e.m.f.)?

    A.

    Ampere (AA)

    B.

    Ohm (Ω\Omega)

    C.

    Volt (VV)

    D.

    Coulomb (CC)

Download the worksheet for Electricity and Magnetism - Electrical quantities to practice offline. It includes additional chapter-level practice questions.

Electric circuits

Subtopic

Electric circuits under Electricity and Magnetism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    How does the resistance of a metallic conductor change if its length is doubled and its cross-sectional area is also doubled?

    A.

    It increases by four times

    B.

    It remains the same

    C.

    It doubles

    D.

    It is halved

  2. 2.

    In the circuit diagram below, which component is incorrectly placed if the goal is to measure the total current and the potential difference across the resistor?

    A.

    The Cell

    B.

    The Switch

    C.

    The Ammeter

    D.

    The Voltmeter

  3. 3.

    Which of the following is the correct SI unit for Electromotive Force (e.m.f.)?

    A.

    Volt

    B.

    Newton

    C.

    Joule

    D.

    Ampere

Download the worksheet for Electricity and Magnetism - Electric circuits to practice offline. It includes additional chapter-level practice questions.

Practical electricity

Subtopic

Practical electricity under Electricity and Magnetism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is the standard unit used by electricity companies to measure and bill energy consumption in households?

    A.

    Watt (WW)

    B.

    Ampere-hour (AhAh)

    C.

    Kilowatt-hour (kWhkWh)

    D.

    Joule per second (J/sJ/s)

  2. 2.

    A microwave oven is rated at 1200 W1200\text{ W} and is connected to a 240 V240\text{ V} mains supply. What is the current flowing through the microwave?

    A.

    0.2 A0.2\text{ A}

    B.

    5.0 A5.0\text{ A}

    C.

    10.0 A10.0\text{ A}

    D.

    288.0 A288.0\text{ A}

  3. 3.

    In the standard wiring of a three-pin plug, which label correctly matches the wire to its color and pin destination?

    A.

    Wire A is Green/Yellow and connects to the Earth pin

    B.

    Wire B is Blue and connects to the Live pin

    C.

    Wire C is Brown and connects to the Neutral pin

    D.

    Wire A is Red and connects to the Earth pin

Download the worksheet for Electricity and Magnetism - Practical electricity to practice offline. It includes additional chapter-level practice questions.

Electromagnetic effects

Subtopic

Electromagnetic effects under Electricity and Magnetism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which change would result in a decrease in the magnitude of the induced e.m.f. in an AC generator?

    A.

    Increasing the number of turns in the coil

    B.

    Using a stronger set of permanent magnets

    C.

    Decreasing the speed of rotation of the coil

    D.

    Increasing the area of the coil within the magnetic field

  2. 2.

    The diagram below shows the basic structure of a transformer. What material is most commonly used for the part labeled 'Core' and why?

    A.

    Steel, because it is a permanent magnet

    B.

    Soft iron, because it is easily magnetized and demagnetized

    C.

    Copper, because it is an excellent electrical conductor

    D.

    Aluminum, because it is lightweight and reduces heat

  3. 3.

    According to Fleming's Left-Hand Rule, if the thumb represents the direction of the force (motion) and the second finger represents the direction of the conventional current, what does the first finger represent?

    A.

    The direction of the magnetic field

    B.

    The direction of the induced e.m.f.

    C.

    The velocity of the conductor

    D.

    The electric charge of the particles

Download the worksheet for Electricity and Magnetism - Electromagnetic effects to practice offline. It includes additional chapter-level practice questions.

Nuclear atom

Subtopic

Nuclear atom under Electricity and Magnetism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What happens to the proton number (ZZ) and the nucleon number (AA) of a nucleus during the emission of an alpha (α\alpha) particle?

    A.

    ZZ decreases by 2, AA decreases by 4

    B.

    ZZ increases by 1, AA stays the same

    C.

    ZZ stays the same, AA decreases by 4

    D.

    ZZ decreases by 4, AA decreases by 2

  2. 2.

    Which type of ionizing radiation is the most penetrating and can only be stopped by several centimeters of lead?

    A.

    Alpha (α\alpha) particles

    B.

    Beta (β\beta) particles

    C.

    Gamma (γ\gamma) rays

    D.

    Neutron radiation

  3. 3.

    A radioactive isotope is represented by the nuclide notation 92238U^{238}_{92}U. How many neutrons are present in the nucleus of this atom?

    A.

    92

    B.

    146

    C.

    238

    D.

    330

Download the worksheet for Electricity and Magnetism - Nuclear atom to practice offline. It includes additional chapter-level practice questions.

Electricity and Magnetism - Grade 12 Physics (IGCSE) | Krit.club