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RAC and Electricity

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Effective Date: 01 December 2008

SET A

UNIVERSITI KUALA LUMPUR Malaysia France Institute

FINAL EXAMINATION SEPTEMBER 2013 SESSION

SUBJECT CODE : FCD 10202

SUBJECT TITLE : RAC AND ELECTRICITY

LEVEL : DIPLOMA

TIME / DURATION : 2 HOURS

DATE :

INSTRUCTIONS TO CANDIDATES

1. Please read the instructions given in the question paper CAREFULLY.

2. This question paper is printed on both sides of the paper.

3. Please write your answers on the answer booklet provided.

4. Answers should be written in blue or black ink except for sketching, graphic and illustration.

5. This question paper consists of TWO (2) sections. Section A and B. Answer all questions in Section A. For Section B, answer one (1) question only.

6. Answer all questions in English.

THERE ARE 5 PAGES OF QUESTIONS, EXCLUDING THIS PAGE.

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SECTION A (Total:60 marks)

INSTRUCTION: Answer ALL questions.

Please use the answer booklet provided.

Question 1

For the circuit in Figure 1, the meter reads 7.69mA when the switch is in position A.

(a) The total resistance for the circuit.

(4 marks)

(b) What are the main characteristics of series circuits in term of resistances, currents and voltage drop on resistors?

(6 marks)

(c) Determine the resistance value for resistor R4.

(2 marks) (d) Determine the current measured by the meter for switch position B, C and D.

(6 marks) (e) Determine the minimum current rating for the fuse in the circuit.

(2 marks)

1kΩ 2kΩ 3kΩ

50V

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Question 2

For the circuit shown in Figure 2, determine:

(a) The total resistance for the circuit.

(2 marks) (b) The current through each resistor.

(6 marks) (c) The voltage drop across each resistor.

(6 marks) (d) The power dissipated on each resistor.

(6 marks)

Figure 2

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Question 3

All values in Figure 3 are given in rms.

(a) Determine the rms current through each resistor in the circuit.

(10 marks) (b) Find the total power in the circuit if the supply voltage is 110V in rms.

(10 marks)

Figure 3

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SECTION B (Total: 40 marks)

INSTRUCTION: Answer ONE (1) question only Please use the answer booklet provided.

Question 4

(a) Describe the basic construction of a capacitor.

(10 marks) (b) Describe the charging and discharging process of a capacitor.

(10 marks) (c) The capacitors shown in the circuit of Figure 4 are initially uncharged.

(i) After the switch is closed, calculate the total charge supplied by the source.

(10 marks) (ii) Determine the voltage across each capacitor after the switch is closed.

(10 marks)

Figure 4

20V

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Question 5

Figure 5 shows a magnate with 500 turns.

(a) Determine the magnetic field intensity.

(10 marks) (b) Determine the Magnetic flux.

(15 marks) (c) Determine the Magnetic flux density.

(15 marks)

END OF QUESTION PAPER

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