Electricity & Electromagnetism: AS91173 Level 2 Physics

This achievement standard (AS91173) requires students to demonstrate understanding of static electricity, DC circuits, and electromagnetism, integrating mathematical solutions and descriptive explanations to earn 6 Level 2 credits.

Core Principles

Static Electricity Fundamentals: Master uniform electric fields, electric field strength, force on charges, electric potential energy, and work done on charges.
DC Electricity Circuit Analysis: Accurately draw and interpret circuit diagrams, analyze series, parallel (including resistive components in series with source), and complex circuits, applying concepts of voltage, current, resistance, energy, and power.
Electromagnetism Principles: Comprehend forces on current-carrying conductors and charged particles in magnetic fields, understand the operation of DC motors, induced voltage in moving conductors, and the simple generator.
Skill Application: Consistently use appropriate significant figures, units, and negative index notation (e.g., ms⁻² or m/s²) in all calculations and descriptions.

Action Steps

Achieve 'Understanding': Write statements demonstrating awareness of how simple facets of phenomena, concepts, or principles relate to a described situation.
Achieve 'In-depth Understanding': Write statements providing specific reasons why phenomena, concepts, or principles relate to a described situation, incorporating mathematical solutions where information is not immediately obvious.
Achieve 'Comprehensive Understanding': Write statements that clearly demonstrate understanding of the connections between multiple concepts.

Formulas

Electric Field Strength: $E = \frac{V}{d}$
Force on a Charge: $F = Eq$
Change in Electric Potential Energy: $\Delta E_p = Eqd$
Kinetic Energy: $E_k = \frac{1}{2}mv^2$
Force on Current-Carrying Conductor: $F = BIL$
Force on Charged Particle: $F = Bqv$
Induced Voltage: $V = BvL$
Current: $I = \frac{q}{t}$
Voltage (Ohm's Law): $V = IR$
Power: $P = IV$
Power (Energy/Time): $P = \frac{\Delta E}{t}$
Series Resistance: $R_T = R_1 + R_2 + ...$
Parallel Resistance: $\frac{1}{R_T} = \frac{1}{R_1} + \frac{1}{R_2} + ...$

Key Terms

Demonstrate understanding: Writing statements that show an awareness of how simple facets of phenomena, concepts, or principles relate to a described situation.
Demonstrate in-depth understanding: Writing statements that give reasons why phenomena, concepts, or principles relate to a described situation, often requiring mathematical solutions where information is not immediately obvious.
Demonstrate comprehensive understanding: Writing statements that demonstrate understanding of the connections between multiple concepts.
Negative index notation: Using exponents like ms⁻² or m/s² for units, indicating inverse relationships or units in the denominator.

Pitfalls to Avoid

Vague Explanations: Providing general statements without specific reasons or connections prevents achieving 'in-depth' or 'comprehensive' understanding.
Ignoring Mathematical Solutions: Relying solely on descriptions without appropriate mathematical solutions limits achievement, especially for 'in-depth understanding' where information may not be directly obvious.
Incorrect Unit Usage: Failing to use appropriate significant figures, units, or negative index notation (e.g., ms⁻² instead of m/s²) will result in loss of marks.