Results
Q1. All effects of electricity take place because of the existence of a tiny particle called the:
Correct answer is – electron
Q2. The nucleus of an atom is:
Correct answer is – positively charged
Q3. An atom is electrically balanced when:
Correct answer is – its protons and electrons balance each other
Q4. The electrons of an atom are:
Correct answer is – negatively charged
Q5. A material with a deficiency of electrons becomes:
Correct answer is – positively charged
Q6. A material with a surplus of electrons becomes:
Correct answer is – negatively charged
Q7. Heat produces an electric charge when:
Correct answer is – the junction of two unlike metals is heated
Q8. Friction causes:
Correct answer is – static electricity
Q9. Chemical action produces electricity in:
Correct answer is – a primary cell
Q10. A photo electric cell produces electricity when:
Correct answer is – exposed to a light source
Q11. The difference in electric potential is measured in:
Correct answer is – volts
Q12. Electrical power is measured in:
Correct answer is – watts
Q13. The unit measurement of electrical resistance is:
Correct answer is – the ohm
Q14. An ammeter measures:
Correct answer is – current
Q15. Materials containing ‘free electrons’ are called:
Correct answer is – conductors
Q16. The unit used for measuring the EMF of electricity is:
Correct answer is – the volt
Q17. The unit used for measuring:
Correct answer is – resistance – is the ohm
Q18. Three resistors of 60 ohms each in parallel give a total resistance of:
Correct answer is – 20 ohms
Q19. A voltmeter measures:
Correct answer is – electromotive force
Q20. Watts =
Correct answer is – volts × amps
Q21. The total resistance of a number of power consumer devices connected in series is:
Correct answer is – the addition of the individual resistances
Q22. The total resistance of a number of resistances connected in parallel is:
Correct answer is – frac{1}{R_{T}}=frac{1}{R_{1}}+frac{1}{R_{2}}+frac{1}{R_{3}}+frac{1}{R_{4}}
Q23. Ohm’s Law states:
Correct answer is – Current in amps = Electromotive force in volts / Resistance in ohms
Q24. A device consuming 80 watts at 8 amps would have a voltage supply of:
Correct answer is – 10 volts
Q25. In a simple electrical circuit, if the resistors are in parallel, the total current consumed is equal to:
Correct answer is – the sum of the currents taken by the resistors
Q26. The symbol for volts is:
Correct answer is – V or E
Q27. Electrical potential is measured in:
Correct answer is – volts
Q28. If a number of electrical consuming devices were connected in parallel, the reciprocal of the total resistance would be:
Correct answer is – the sum of the reciprocals of the individual resistances
Q29. The current flowing in an electrical circuit is measured in:
Correct answer is – amps
Q30. Electromotive force is measured in:
Correct answer is – volts
Q31. Ohm’s Law is given by the formula:
Correct answer is – I=frac{V}{R}
Q32. The current flowing in a circuit is:
Correct answer is – inversely proportional to resistance, directly proportional to voltage
Q33. The unit of EMF is the:
Correct answer is – vol
Q34. Potential difference is measured in:
Correct answer is – volts
Q35. The unit of current is the:
Correct answer is – ampere
Q36. The unit of resistance is the:
Correct answer is – ohm
Q37. Electrical power is measured in:
Correct answer is – watts
Q38. 1250 ohms may also be expressed as:
Correct answer is – 1.25 k ohms
Q39. 1.5 M ohms may also be expressed as:
Correct answer is – 1500 k ohms
Q40. 550 k ohms may also be expressed as:
Correct answer is – 0.55 M ohms
Q41. If the voltage applied to a simple resistor increases:
Correct answer is – current flow will increase and power consumed will increase
Q42. What is the total resistance in this circuit: 10 ΚΩ 1 ΚΩ 500 Ω
Correct answer is – 11.5 k ohms
Q43. The total resistance of the circuit is:
Correct answer is – 14 ohms
Q44. The current flow indication on ammeter ‘A’ would be:
Correct answer is – 2 amps
Q45. The total power consumed in the circuit will be:
Correct answer is – 56 watts
Q46. The power consumed by R_{5} alone is:
Correct answer is – 28 watts
Q47. The indication on voltmeter V1 will be:
Correct answer is – 9.2 volts
Q48. The indication on voltmeter V3 will be:
Correct answer is – 14 volts
Q49. The indication on voltmeter V2 will be:
Correct answer is – 4.8 volts
Q50. The current flowing through R_{2} is:
Correct answer is – 0.4 amps
Q51. The current flowing through R_{3} is:
Correct answer is – 0.4 amps
Q52. The current flowing through R_{4} is:
Correct answer is – 1.2 amps
Q53. The power consumed by R_{2} alone is:
Correct answer is – 1.92 watts
Q54. The power consumed by R_{3} alone is:
Correct answer is – 1.92 watts
Q55. The power consumed by R_{4} alone is:
Correct answer is – 5.76 watts
Q56. The power consumed by R_{1} alone is:
Correct answer is – 18.4 watts
