PRINCIPLES OF ELECTRICAL AND ELECTRONIC BEKG 1113

PRINCIPLES OF ELECTRICAL AND ELECTRONIC BEKG 1113

TUTORIAL 1

1. What is the basic particle of negative charge?

2. Define atom and what does an atom consist of?

3. Define atomic number and free electron.

4. What is a shell in the atomic structure?

5. What is a balanced atom and how does the Ion process happen?

6. The unit of electrical quantity is the coulomb. Define coulomb and give its equation.

7. Define voltage, current and resistance with its symbol and unit.

8. Ohms is most important steps in the analysis of the circuit. Define Ohms Law and give its equation.

9. Define and give some examples of conductor and insulator.

10. List Four (4) passive components with the schematic symbols and briefly describe the characteristics of each component.

11. List Two (2) passive components with the schematic symbols and briefly describe the characteristics of each component.

12. The unit SI (International System of Units) is based on the measures of six physical quantities. Please state all those physical quantities with symbol and unit.

13. What is the charge transferred in a period of 8s by current flowing at the rate of 2.5A?

14. A 12V is applied to a 7.5 resistor for a period of 5s. Calculate the electric charge transferred in this time.

15. In engineering notation and scientific notation, the following number can be written as?

i) 0.000056

ii) 0.000421

iii) 0.01245

iv) 299,792,458 m/s

v) 28,672

vi) 175,450

16. Solve the following Metric Arithmetic and give answer in engineering notation and scientific notation:

i) 10,000 W + 22 kW

ii) 45,987 + 2 k

iii) 489 M + 240 k

iv) 720 k + 720

v) 200 mA + 1.0 mA

17. Determine the color band for each of the following 4-band resistors. Assume each has 5 % tolerance.

i) 0.47 M

ii) 270 k

iii) 5.1 M

18. Determine the resistance and tolerance of each following 4 band resistor.

i) Brown, black, black, gold

ii) Green, brown, green, silver

iii) Blue, gray, black, gold

19. Explain briefly why the ammeter needs to be connected in series when measuring the current in the circuit.

20. Explain briefly why the voltmeter needs to be connected in parallel when measuring the voltage in the circuit.

TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false.

1. Inductors store energy in an electrostatic field. ...........................

2. An electronic device which stores an electric charge is known as an inductor. ...........................

3. The symbol is an abbreviation of 10-6 or micro. ...........................

4. The voltage across a circuit resistance is inversely related to the current through the resistance. ...........................

5. Increasing voltage while maintaining the same resistance will cause current to decrease. ...........................

6. A mathematical relationship between current, voltage, and resistance was determined by George Ohm. ...........................

7. A resistor is a device that opposes the flow of electrons. ...........................

8. The shorthand method that uses a base number between 1 and 10 is scientific notation. ...........................

9. The unit of electrical charge is measured in Coulombs. ...........................

10. The rate flow of free electrons in a conductive material is called current. ...........................

GOOD LUCK

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