DSEE Physics Paper 2B 2022 — Past Paper & Online Quiz

1. 0 marks

Conduct an experiment to determine the resistance of the resistor Q from the following procedures: Procedures: (a) Connect resistor Q, resistance box, two dry cells and a switch in series to complete a circuit. Then connect a 0 – 5 V voltmeter across the resistance box. (b) Read the voltmeter and record the value of V when a resistor of 2 Ω is set on the resistance box. (c) Repeat the procedure in 3 (b) by setting a resistance box in such a way that R = 4 Ω, 6 Ω, 8 Ω and 10 Ω to obtain a total of four other readings.

(i) Tabulate your results, including the values of m (g), t (sec), T (sec) and T^2 (sec^2). 0 mk

(iii) Calculate the effective mass (mes) of the spring where K = 0.98N / S(cm). 0 mk

(ii) Plot a graph of m (g) against T^2 (sec^2). 0 mk

(iv) What is the physical meaning of constant K? 0 mk

(v) Use y-intercept of the graph to determine the value of the effective mass of the spring mes. 0 mk

(vi) Using effective mass obtained in 1 (v), write down the relationship between mass of the spring (mS) and mes, and hence use the relation to solve for mS. 0 mk

(vii) What will be the total mass of the spring loaded over the digital balance? 0 mk

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2. 0 marks

(i) Draw the circuit diagram you connected as per instructions given Page 4 of 5 1 1 (ii) Tabulate your results including the columns for and V R 1 1 (iii) Plot a graph of against . V R  R  (iv) Using a graph and the equation V  E , determine the values of   QR resistor Q and e.m.f of the dry cells. (v) (v) If an electrical engineer used another method to determine the value of resistor Q and got 5 Ω, would the value be recommended to replace the damaged resistor? Justify your answer. Page 5 of 5

(i) Tabulate your results. 0 mk

(ii) Plot the cooling curve for liquid A and B on the same axis. 0 mk

(iii) Obtain the gradient at 60°C for each liquid from the graph plotted in 2 (ii). 0 mk

(iv) Deduce the equation governing this experiment. 0 mk

(v) Determine the specific heat capacity of liquid B given that the specific heat capacity of liquid, A, CA = 4200 J/kg K and the specific heat capacity of calorimeter, C = 400 J/kg K. 0 mk

(vi) Compare the specific heat capacities of the two liquids and explain why one of the liquids is more suitable to be used as a cooling agent in a car radiator than the other. 0 mk

(vii) What is the aim of doing this experiment? 0 mk

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3. 0 marks

Conduct an experiment to determine the resistance of the resistor Q from the following procedures: Procedures: (a) Connect resistor Q, resistance box, two dry cells and a switch in series to complete a circuit. Then connect a 0 – 5 V voltmeter across the resistance box. (b) Read the voltmeter and record the value of V when a resistor of 2 Ω is set on the resistance box. (c) Repeat the procedure in 3 (b) by setting a resistance box in such a way that R = 4 Ω, 6 Ω, 8 Ω and 10 Ω to obtain a total of four other readings.

(i) Draw the circuit diagram you connected as per instructions given. 0 mk

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Physics · Paper 2B · 2022

Physics · Paper 2B · 2022

Section B

Section D

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