2022 YTSS Phy Prelims P3 Ans

ANSWER 4E P-Phy Prelim P3 2022 (V3) 1 This paper will assess the following skills areas: Planning (P) Manipulation, measurement and observation (MMO) Presentation of data and observations (PDO) Analysis, conclusions and evaluation (ACE) Go through Video at: https://tinyurl.com/ytssprelimP32022 Name: . Index: . Class: . Only penalise once per question on unit and precision error respectively. Notation: dp: condone second precision error in reading. sf: condone second precision error in calculation. uu: condone second error in units. Ques Answer Marks Score 1(a) MMO I is measured to 2 dp in A. (FYR: 0.30 A – 0.50 A) 1 MMO V is measured to 2 dp in V. (FYR: 1.30 V – 1.60 V) 1 ACE (Working should be clearly shown) (condone) E.g. 0.30 x 1.30 = 0.39 W (2sf) Correct calculation of P in W and recorded in least sf. (2 sf.) P should be in the range of 0.30 W to 1.5 W. (condone) 1 1(c) ACE (Working should be clearly shown) (condone) Correct calculation of m in g and recorded in least sf. (2 sf.) m = 36 g 1 1(d) MMO t is measured to 1 dp in s. (condone 2 dp) t should be in the range of 55 s to 150 s. 1 1(e) Plan  Stating at least two controlled quantities correctly:  The (mass or volume or type) of oil.  The power of the heater.  The EMF of battery.  The resistance of the heater.  The type of heater Do NOT accept “The circuit / The oil / The wires / Type of wire” 1  The graph plot should have the independent variable as X-axis and dependent variable as Y-axis  Possible answer includes: 1  for graphs: 1

ANSWER 4E P-Phy Prelim P3 2022 (V3) 2 Ques Answer Marks Score c = (gradient) x P/m c = (gradient) /m c = (gradient) /m c = (gradient) x P/Δθ c = (gradient) /Δθ Mark according to the graph to be plotted t / s / oC V / cm3 m / g t / s 1  Describe how the exp should be performed by including:  Two measure and record steps for IV and DV using the the correct equipment respectively.  Calculation step (e.g. Pt or /P)  Tabulation step . (condone missing quantities here)  Repeat step to obtain 4 or 5 other sets of data  Plotting step (condone wrong graph here) Plan should be expressed as steps each starting on a new line. Key action words must be used. Otherwise, loss this [1] 1 Ques Answer Marks Score 2(c) MMO u is measured to 1 dp in cm. 1 2(d) ACE EITHER use a ruler to determine the thickness of the lens, t. measure the distance between the insert and the lowest point of the lens, d. calculate u = d + t/2 OR other ideas that make sense. 1 2(e) ACE Show evidence of averaging. MMO h1 measured to 1 dp in cm. (FYR: h1 = 1.7 cm) 1 1 2(f) ACE 1

ANSWER 4E P-Phy Prelim P3 2022 (V3) 3 Ques Answer Marks Score  It is difficult to measure h1 on a curved surface  light reflect into the eyes making it hard to read the scale  difficult to align the scale of the ruler to the scale of the image  accept l