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TPC Basic Electricity & Electronics Exam Questions with accurate solutions
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TPC Basic Electricity & Electronics ExamQuestions with accurate solutions
All modern electrical equipment is based on an understanding of the
relationship between _________
and _________. - -electricity; magnetism
- If a gap exists in an electric circuit, the circuit is said to be - -open
- Atomic particles that have a positive electrical charge are called - -protons
- Static electricity - -does not move
- You may find electricity easier to understand if you think of voltage as
electrical - -pressure
- Identical cells connected in __________ provide greater _________ than a
single cell. - -parallel; current capacity
- You must be careful when recharging lead-acid batteries because they - -
can explode
can throw acid around the area
produce flammable gases
"all of the above" ALL IS ANSWER
- The negative plate in an electrochemical cell is called the - -cathode
- Which device for producing a potential difference consists of two different
metals welded together? - -Thermocouple
- An optoisolator receives a low-voltage signal on the LED side of the device
and triggers a device that
produces a ___________ voltage on the output side. - -higher
- The purpose of a potentiometer is to - -divide a potential difference into
two parts
- Power is measured in - -watts
- Variable resistors in the range of ^1/_2 to 2 watts are called _____________,
while those in the range of
5 to 1000 watts are called _____________. - -potentiometers; rheostats
, - If the fourth color band on a resistor is silver, the measured value of
resistance is within _________% of
the marked value - -10
- Which of the following diode operating specifications defines the maximum
potential difference that can
be applied across a diode in the reverse direction without destroying it? - -
Peak inverse voltage
- The center section of a transistor is - -base
- A cathode has a ______________ charge. - -negative
- In a vacuum tube, the anode is a - -metal plate with a positive charge
- The maximum current that a semiconductor diode can conduct for part of
an ac cycle is called the
__________ current. - -peak rectified
- In equations, L stands for inductance in henrys and C stands for
capacitance in - -farads
- What is the standard frequency of alternating current in the United States?
- -60 Hz
- One complete cycle of alternating current is generated by a _________-
degree rotation of a two-pole
alternator. - -360
- Power companies use _________ generators and transformers for cost-
effective transmission over long
distances. In contrast, _________ power cannot be transformed. - -ac, dc
- If an ac circuit is purely resistive in nature, you can use __________ law
exactly as you did in a dc circuit. - -Ohm's
- If the potential difference across a resistor decreases to zero, the current -
-decreases to zero
- The purpose of a shunt in an ammeter is to - -carry current around the
meter movement
- One ampere equals one - -coulomb per second
- Ohm's Law can be expressed mathematically as - -E = I x R
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