Passive Components

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1. Which one of the following is NOT a preferred value in the E6 series? a) 1.5 b) 2.2 c) 3.9 d) 6.8

2. Which of the following gives the value of the resistor shown below? a) 56 kohm, 5% b) 560 kohm, 10% c) 580 kohm, 5% d) 680 kohm, 10%.

3. The component shown below is: a) an air-cored inductor b) a variable transformer c) an air-spaced capacitor d) a ferrite-cored inductor.

4. Which one of the following gives the effective resistance of the circuit shown below? a) 67 ohm b) 100 ohm c) 150 ohm d) 300 ohm.

5. What type of component is shown below? a) Metal clad resistor b) Carbon film resistor c) Ceramic coated wrirewound resistor d) Vitreous enamel coated wirewound resistor.

6. A current of 2 A flows in a 5 H inductor. What energy is stored in the inductor? a) 2.5 J b) 5 J c) 10 J d) 20 J.

7. Which one of the symbols shown below represents an electrolytic capacitor? a) A b) B c) C d) D.

8. The resistance of a light dependent resistor (LDR): a) is usually zero in total darkness b) falls as the light level increases c) increases as the light level increases d) remains constant over a wide range of light levels.

9. The component shown below is: a) a fixed inductor b) a variable inductor c) a fixed capacitor d) a variable capacitor.

10. A capacitor of 20 uF is charged to a potential of 50 V. Which one of the following gives the charge stored? a) 1 mC b) 2.5 uC c) 2.5 mC d) 400 uC.

11. A ceramic capacitor is marked '102K'. Which one of the following gives its value? a) 1 nF, 10% b) 10 nF, 2% c) 102 nF, 10% d) 102 kF, 10%.

12. The component shown below is: a) a pre-set resistor b) a variable resistor c) a pre-set capacitor d) a variable capacitor.

13. The component shown below is: a) a pre-set resistor b) a variable resistor c) a pre-set capacitor d) a variable capacitor.

14. Which one of the following types of capacitor has the highest stability? a) mica b) ceramic c) polyester d) electrolytic.

15. Which one of the following types of resistor has the highest power rating? a) metal clad b) carbon rod c) carbon film d) vitreous enamel coated wirewound.