Electrical and electronic :: Voltage, Current and Resistance

 

1.	Materials with lots of free electrons are called
	A. conductors B. insulators C. semiconductors D. filters Answer: Option A 2.  The unit of electrical charge is the A. coulomb B. joule C. volt D. watt Answer: Option A 3.  Current flows in a circuit when A. a switch is opened B. a switch is closed C. the switch is either open or closed D. there is no voltage Answer: Option B 4.  The minimum resistance value for a blue, gray, red, silver resistor is A. 612  B. 6,120  C. 6,800  D. 6,460  Answer: Option B 5.  The maximum resistance value for a brown, red, yellow, gold resistor is A. 126,000  B. 126,600  C. 114,000  D. 132,000  Answer: Option A
	6. Which of the following is not a type of energy source?
	A. generator B. rheostat C. solar cell D. battery Answer: Option B

7.	When placed close together, two positively charged materials will
	A. attract B. become neutral C. become negative D. repel
	8.The conductance of an 8 ohm resistance is
	A. 12.5 mS B. 8 mS C. 12 S D. 125 mS Answer: Option D
	9.Electrons in the outer orbit are called
	A. nuclei B. valences C. waves D. shells Answer: Option B
	10. A thermistor is a type of
	A. switch B. resistor C. battery D. power supply Answer: Option B