Electronics Information
Electrical and electronic principles, circuits, and common terminology.
~8m
Practice this sectionPractice Questions
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What's the primary advantage of a quad band cell phone over a dual-band cell phone?
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When working with electricity, you should assume that all electrical equipment is alive unless you know for certain otherwise. This prevents:
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The heat effect of current is created:
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What special type of diode is commonly used to regulate voltage?
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Electromotive force is another way of saying:
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A primary advantage of using a Li-Ion battery instead of a NiMH battery in your cell phone is:
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Transistors contain at least three terminals called the: http://www.gratisexam.com/
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TC. ntrol a light fixture from two different wall switches, you should use:
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A transistor is also called a:
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The hot wire is always:
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How wide is the full AT motherboard?
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If a 120-volt current is protected by a 25-amp circuit breaker, what's the largest number of watts an appliance can safely use?
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16-gauge wire is __________________ than 12-gauge wire.
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A 120-volt circuit has a resistance of 12 ohms. How much current is present in the circuit?
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When the secondary side of a transformer has more turns than the primary side, the output voltage will be___________the input voltage.
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How much power is being carried in a 220-volt circuit when the current is 10 amps?
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Capacitors connected in parallel
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Another name for a transistor is
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Current that changes polarity many times per second is called
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Parallel resonance occurs in a circuit when
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A filter is used in a power supply to
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Which of the following contains an electromagnet?
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Radio frequency amplifiers are used in
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A crystal microphone uses
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A crossover network is used to
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The two basic types of oscillators used for microwave generation are the magnetron and the
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The two types of diodes used in electronics work are the semiconductor diode and the
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Analog color television relies on three colors to produce the full color range needed for a good picture: red, blue, and
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The folded dipole antenna has an impedance of
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Electricity is defined as
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A conductor is any material that
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Convention current flow is from
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Electron flow is from
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An insulator is a material with
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Opposition to current flow is measured in
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A watt is the power that gives rise to the production of energy at the rate of
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The FM band covers
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Ohm’s law states:
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An electromagnetic-induction device usually has which of the following materials in its core?
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How many diodes should you expect to find in a bridge rectifier?
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Another name for cycles per second is:
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Newer cell phones contain a removable memory card, which is often called a:
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When current flows through a wire, the following influences are present:
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Millihenries are related to:
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Radar can operate at frequencies as high as:
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Radio waves travel:
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Changing alternating current to direct current is called:
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Insulated fittings can be used to splice wires, thus eliminating the need for:
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The symbol shown above stands for:
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The Greek letter phi (<p) is used to
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A parallel circuit with resistors of 10 ohms, 10 ohms, and 5 ohms has a total resistance of
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The symbol for inductance is
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Inductive reactance is found by using
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A capacitor of 100 micro farads has a capacity of
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Which of the following isn't a component of a DC motor?
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A current passed through a muscle in the human body causes the muscle tC. ntract. This is known as:
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In a closed electrical circuit:
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What does RMS stand for?
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A fuse with a higher-than-required rating used in an electrical circuit:
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Neutral wire is always:
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To measure electrical power, you would use a(n):
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If you operate an incandescent light bulb at less than its rated voltage:
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Two electrical wires run to a machine. One wire is 6mm thick, and the other is 3mm thick. For the two wires to carry the same current, the larger wire:
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Impedance is represented by the symbol
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A junction diode is used for
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The SCR is a
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In an FM receiver the AFC is
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How many wires do serial cables used on computers have?
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To produce greater storage of electrons and more capacitance, capacitors should:
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A light bulb is 60 watts. Operated at 120 volts, how much current does it draw?
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A number-12 wire, compared to a number-6 wire:
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The television broadcast standard used in the United States is:
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When a circuit breaker trips, in what position will you find the operating handle?
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Which wire is smallest?
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How many paths of electrical flow can be found in a series circuit?
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A microwave is rated at 1,200 watts. At 120 volts, how much current does it draw?
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Electricians use the term low potential to refer to:
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Which of the following isn't a conductor of electricity?
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