RI 2023 Y5 Phy T3 CT Sect B Soln

Raffles Institution Year 5-6 Physics Department 1 2023 Year 5 H2 Physics Term 3 Common Test Solution Section B Important points to note 1. Quantitative questions (i.e. questions that involve calculations) • Write the concept used to solve (e.g. By the conservation of energy) and clearly state where it is being applied (e.g. from the bottom to the top of the circular motion). • Write the equation in words and/or in symbols. Use standard symbols (e.g. m for mass). Refer to the list of key quantities, their symbols and units in the syllabus document for the standard symbols used for the A-level examinations. If other symbols are used and it is not clear what quantity they represent, students would need to define them clearly. • Substitue all numerical values into the equation in the appropriate units. • Make the quantity to be determined the subject of the equation. • Write the answer to more than 3 significant figures. • Write the final answer to the appropriate number of significant figures and with units. 2. Qualitative questions (i.e. ‘explain’, ‘describe’ questions that involve writing in continuous prose) • Read the question carefully to be clear of the objective of the question. The number of marks allocated are a good indication of the demands of the question. • Write in full but short sentences. • Points presented should follow a logical sequence until the objective of the question is met. • State the specific Physics concepts/principles/definitions used to support the explanation. • Use specific Physics terminologies. • Equations may be used to support the explanation. However, equations must be accompanied with word explanations. • Do not use abbrievations especially for the important concepts used in the explanation (e.g. by COE, COM, POM). • Spell out all quantities (e.g. force instead of F , mass instead of m ). If there are too many quantities to define in a stated equation, then use standard symbols or the symbols that have already been defined in the question. However, for sybmols that could be ambiguous, students should spell these quantities out (e.g. if the explanation includes gravitational force and centripetal force, then using F G and FC is ambiguous if they are not defined). • S tudents should make use of the information/data given in the question to answer the question/deduce/draw conclusion as specificallly as possible (e.g. students should state that a quantity increases or decreases if the details given are sufficient to make this deduction, instead of just stating the quantity will not be the same or will change). • Read the answer again to ensure the objective of the question is met.

Raffles Institution Year 5-6 Physics Department 2 3. For ‘show’ questions, the marks allocated are for clear step-by-step working and explanations. No marks are given for the final answer since the answer is already given. Hence, all relevant working and substitutions have to be