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.

1. Tabulate your results, including the values of m (g), t (sec), T (sec) and T^2 (sec^2). (0 mk)
2. Calculate the effective mass (mes) of the spring where K = 0.98N / S(cm). (0 mk)
3. Plot a graph of m (g) against T^2 (sec^2). (0 mk)
4. What is the physical meaning of constant K? (0 mk)
5. Use y-intercept of the graph to determine the value of the effective mass of the spring mes. (0 mk)
6. 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)
7. What will be the total mass of the spring loaded over the digital balance? (0 mk)

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(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

1. Tabulate your results. (0 mk)
2. Plot the cooling curve for liquid A and B on the same axis. (0 mk)
3. Obtain the gradient at 60°C for each liquid from the graph plotted in 2 (ii). (0 mk)
4. Deduce the equation governing this experiment. (0 mk)
5. 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)
6. 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)
7. What is the aim of doing this experiment? (0 mk)

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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.

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

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