CSEC Physics Paper 3 May/June 2012 - Free CXC Past Paper with Answers

Free CXC Physics Paper 3 May/June 2012 past paper from 2012. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.

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CSEC Physics Paper 3 May/June 2012 Questions

Every question from this paper as text. See the answers and worked solutions. Questions are the property of the Caribbean Examinations Council; Caribbean AI is not affiliated with CXC.

Question 1 (20 marks)

(a)

Complete Table 1 by

looking at the trend and choosing a suitable value for the temperature reading
reading the corresponding pressure values from the graph on page 3.

TABLE 1

Pressure/mm Hg
Temperature/K	100	150	200	250	300

[7 marks]

(b)

From the graph calculate the amount by which the pressure changes when the temperature changes by 1 K.

[5 marks]

(c)

Determine the temperature in Celsius when the pressure of the gas is 750 mm Hg.

[4 marks]

(d)

Use the graph to determine the pressure in mm Hg when the temperature is (i) 50 K (ii) 400 K

Question 2 (19 marks)

A group of fifth form physics students was given a School-Based Assessment to

investigate the relationship between voltage, $V$ , and current, $I$ , for a resistor at constant temperature
draw a $V-I$ graph and hence calculate the resistance, $R$ , of the resistor.

[19 marks]

(a)

Figure 1 shows a circuit diagram of the apparatus used.

Figure 1. A circuit diagram

In Table 2 write the name of EACH of the components represented by the letters A – E as shown in Figure 1.

TABLE 2

Letter	Name of Component
A
B
C
D
E

[5 marks]

(b)

The results of the group's activity are recorded in Table 3.

TABLE 3

Voltage (V/V)	Current (I/A)
0.40	0.11
0.60	0.19
0.80	0.25
1.00	0.33
1.20	0.39
1.70	0.56

(i) Plot a graph of V/V against I/A on page 7. Begin both axes at zero, the origin. (ii) Calculate the gradient of the line. (iii) Use the gradient to determine the resistance, $R$ , of the conductor. (iv) The present resistor is now replaced by another resistor. The circuit is closed. The voltage is recorded as 1.9 V and current as 0.48 A. Calculate the resistance of this new resistor.

[14 marks]

(b)(i)

Plot a graph of V/V against I/A on page 7. Begin both axes at zero, the origin.

[6 marks]

(b)(ii)

Calculate the gradient of the line.

[4 marks]

(b)(iii)

Use the gradient to determine the resistance, R, of the conductor.

[1 mark]

(b)(iv)

The present resistor is now replaced by another resistor. The circuit is closed. The voltage is recorded as 1.9 V and current as 0.48 A. Calculate the resistance of this new resistor.

[3 marks]

CSEC Physics Paper 3 May/June 2012 - Free CXC Past Paper with Answers

CSEC Physics Paper 3 May/June 2012 Questions

Question 1 (20 marks)

Question 2 (19 marks)

Question 3 (9 marks)