A current meter is connected to a circuit as shown. What does the current meter read?
A. 3.0 amperes
B. 4.5 amperes
C. 13.5 amperes
D. 15 amperes
This symbol represents what electronic circuit component?
A. power source
B. load
C. transistor
D. conductor
Radio waves travel __________.
A. at the speed of light
B. at the speed of sound
C. faster than the speed of light
D. faster than the speed of sound but slower than the speed of light
Which of the following isn't a conductor of electricity?
A. water
B. graphite
C. gold
D. glass
A primary advantage of using a Li-Ion battery instead of a NiMH battery in your cell phone is __________.
A. Li-Ion batteries are lighter
B. Li-Ion batteries last longer
C. Li-Ion batteries don't interfere with signal quality
D. none of the above
The above symbol represents a/an __________.
A. relay
B. on-off switch
C. push switch
D. connected wire
Which of the following contains an electromagnet?
A. Light switch
B. Doorbell
C. Fluorescent lightbulb
D. Incandescent lightbulb
The folded dipole antenna has an impedance of __________.
A. 72 ohms
B. 300 ohms
C. 600 ohms
D. 75 ohms