What's the primary advantage of a quad band cell phone over a dual-band cell phone?
Answer(s): B
There are four frequency bands used throughout the world. A quad-cell phone would be able to access any of these frequency bands.
When working with electricity, you should assume that all electrical equipment is alive unless you know for certain otherwise.This prevents __________.
The greatest concern when dealing with electricity is personal injury.
The heat effect of current is created __________.
Answer(s): C
Heat effect occurs when electrical current must overcome the resistance of the wire. Heat effect can be quite obvious or very subtle.
What special type of diode is commonly used to regulate voltage?
Zener diodes are available in a variety of voltages.
This symbol means __________.
Answer(s): A
The symbol stands for ohm.
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