Page 195 - The Ontario Curriculum, Grades 11 and 12: Science, 2008 (revised)

f2.3 design and build real or computer-simulated mixed direct current (DC) circuits, and explain the circuits with reference to direct current, potential difference, and resistance [PR, C]
f2.4 conduct an inquiry to identify the character- istics and properties of magnetic fields (e.g., using magnetic compasses, iron filings, and electric and magnetic field sensors) [PR]
f2.5 investigate, through laboratory inquiry or computer simulation, the magnetic fields produced by an electric current flowing through a long straight conductor and a solenoid (e.g., use sensors to map the magnetic field around a solenoid) [PR]
f2.6 solve problems involving energy, power, potential difference, current, and the number of turns in the primary and secondary coils of a transformer [AI]
f2.7 investigate electromagnetic induction,
and, using Lenz’s law, the law of conservation of energy, and the right-hand rule, explain and illustrate the direction of the electric current induced by a changing magnetic field [PR, AI, C]
f2.8 construct a prototype of a device that uses the principles of electromagnetism (e.g., an electric bell, loudspeaker, ammeter, electric motor, electric generator), and test and refine their device [PR, AI]
F. Understanding Basic Concepts
By the end of this course, students will:
f3.1 describe the properties of magnetic fields in permanent magnets and electromagnets (e.g., the three-dimensional nature of fields, continuous field lines, fields around current- carrying conductors and coils)
f3.2 explain, by applying the right-hand rule, the direction of the magnetic field produced when electric current flows through a long straight conductor and through a solenoid
f3.3 distinguish between conventional current and electron flow in relation to the left- and right-hand rules
f3.4 explain Ohm’s law, Kirchhoff’s laws, Oersted’s principle, the motor principle, Faraday’s law, and Lenz’s law in relation to electricity and magnetism
f3.5 describe the production and interaction of magnetic fields, using diagrams and the principles of electromagnetism (e.g., Oersted’s principle, the motor principle, Faraday’s law, Lenz’s law)
f3.6 explain the operation of an electric motor and a generator, including the roles of their respective components
f3.7 distinguish between alternating current (AC) and direct current, and explain why alternating current is presently used in the transmission of electrical energy
f3.8 describe the components of step-up and step-down transformers, and, using concepts and principles related to electric current and magnetic fields, explain the operation of these transformers
f3.9 describe and explain safety precautions (e.g., “call before you dig”, current-limiting outlets in bathrooms) related to electrical circuits and higher transmission voltages (e.g., with reference to transformer substations, buried cables, over- head power lines)
ELECTRICITy AND MAGNETISM
1
Physics
SPH3U