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Electricity and Magnetism Practice Questions.
Electromagnetism Exam Practice.
| HSC Paper | Charged Particles | Motor Effect | Electromagnetic Induction | Applications |
|---|---|---|---|---|
| 2021 |
Question 2: Direction of force on a positive charge in an electric field. Question 18: Trajectory analysis of a falling charge when plates are switched off. Question 30a,b: Sketching kinetic energy and explaining motion differences for protons/electrons in electric fields. |
Question 17: Comparing forces measured on parallel AC conductors. Question 21a,b: Calculation of maximum torque and description of torque changes during loop rotation. Question 27a,b: Diagramming current/field orientation for rod levitation and supported by mass calculation. |
Question 10: Direction of force on a copper block as a magnet moves past (eddy currents). Question 24: Calculation of induced emf in a stationary coil with a changing magnetic field. Question 31: Explaining observations (galvanometer/movement) when a solenoid switch is closed. |
Question 7: Identifying transformer type and turns ratio based on current change. Question 12: Graphing back emf magnitude versus angular velocity in a DC motor. |
| 2022 |
Question 12: Determining particle velocity direction in crossed electric and magnetic fields. Question 18: Force relationships for an oil droplet moving at constant speed between plates. Question 34: Explaining differing circular paths of charged particles in a magnetic field. |
Question 4: Force direction on a current-carrying wire in a magnetic field. Question 15: Effect of doubling current and quadrupling distance on force between wires. |
Question 1: Turns calculation for an ideal transformer. Question 19: Effect of adding a second globe to an AC generator circuit on power and rotation difficulty. Question 22: Efficiency features of transformers (laminations and cores). Question 32a,b: Principles of magnetic braking on exercise bikes and methods to increase torque. |
|
| 2023 |
Question 12: Kinetic energy change calculation for a charge between plates with doubled spacing. Question 18: Comparing trajectories in gravitational vs. electric fields with mass changes. Question 24: Magnetic field calculation for a specific electron path radius. |
Question 10: Comparison of force and torque on a loop in different rotational positions. Question 16: Static equilibrium analysis for levitating parallel rods. Question 25a: Identifying the function of a split-ring commutator in a motor. |
Question 30a: Account for force on a copper ring near an electromagnet with changing field. Question 30b(i,ii): Behaviour of a split ring and calculation of maximum induced emf. |
Question 2: Diagrammatic representation of high-voltage transmission and step-up/down transformers. Question 25b: Explaining torque decrease at high rotational speeds in DC motors (back emf). Question 28a,b: Calculation of transformer voltage and primary current changes. Question 31: Analysis of eddy current braking in roller coasters. |
| 2024 |
Question 17: Identifying speed and acceleration characteristics within cyclotron dees. Question 19: Acceleration of a proton in crossed fields when velocity is doubled. Question 28a,b,c: Mathematical derivation of electron acceleration and trajectory displacement between plates. |
Question 21b: Methods to increase torque in a simple DC motor. Question 29a,b: Evaluation of force interaction between parallel rods with different currents. |
Question 15: Graphing induced emf for a conductor rotating about a fixed point in a magnetic field. Question 18: Comparing induced current directions between magnets and coils. Question 33: Motion and energy transformation analysis of a pendulum magnet over a spinning can. |
Question 8: Transformer turns modification for output voltage doubling. |
| 2025 |
Question 6: Identifying the magnetic field direction required for a specific electron arc. Question 14: Effect of electric and magnetic fields on a proton's kinetic energy. Question 31: Comprehensive assessment of cathode ray experiments for electron properties. |
Question 23a,b: Torque calculation on a wire loop and effects of changing field/current. |
Question 17: Graphing and determining the direction of induced emf for a loop moving past a wire. Question 26a,b: Average emf calculation for loop rotation and sketching voltage variations at higher frequency. Question 35: Analysis of balance readings for a magnet falling through a copper pipe. |
Question 2: Identifying step-up transformer turns combinations. Question 11: Ammeter reading changes when a motor slows down (back emf relationship). Question 22: Energy transformations in a power grid and transmission lines. |