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Question #361Basic Electricity and Electronics

What is the color code for a 220ohm 5% resistor?

  1. Red, Red, Brown, Gold ✓ Correct answer
  2. Orange, Orange, Black, Gold
  3. Red, Red, Black, Gold
  4. Red, Red, Brown, Silver

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Question #362Radio Theory and Communication Principles

In a receiver, which stage rectifies the IF signal?

  1. Mixer
  2. Frequency converter
  3. Detector ✓ Correct answer
  4. Loud speaker

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Question #363Basic Electricity and Electronics

The quality factor of R-L-C circuit will increase if

  1. R increases ✓ Correct answer
  2. R decreases
  3. Impedance increases
  4. voltage increases

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Question #364Radio Theory and Communication Principles

Which material opposes the movement of free electrons?

  1. Conductor
  2. Insulator ✓ Correct answer
  3. Semiconductor
  4. Element

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Question #365Basic Electricity and Electronics

A basic electric circuit is made up of what components?

  1. A load, a resistor, and a conductive path for current
  2. A voltage source, a load, and a conductive path for current ✓ Correct answer
  3. A voltage source, a conductive path for current, and a battery
  4. A conductive path for current, a battery, and a copper wire

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Question #366Radio Equipment, Measurements and Safety

An ammeter is used to measure

  1. voltage
  2. current ✓ Correct answer
  3. resistance
  4. All the above

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Question #367Basic Electricity and Electronics

If an electrical system is compared to a fluid system, the electrical current corresponds to the:

  1. pressure
  2. pump
  3. water wheel
  4. water flow ✓ Correct answer

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Question #368Radio Theory and Communication Principles

Components that connect in parallel form:

  1. branches ✓ Correct answer
  2. open circuits
  3. short circuits
  4. a voltage divider

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Question #369Basic Electricity and Electronics

Kirchhoff's current law for parallel circuits states that the:

  1. sum of all branch voltages equals zero
  2. total circuit resistance is less than the smallest branch resistor
  3. sum of currents into a junction is equal to the difference of all the branch currents.
  4. sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction ✓ Correct answer

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Question #370Basic Electricity and Electronics

What is the total resistance of four 1 k parallel-connected resistors?

  1. 200 ohms
  2. 250 ohms ✓ Correct answer
  3. 400 ohms
  4. 4 kilo ohms

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Question #371Basic Electricity and Electronics

What is the total opposition to current in a series RC circuit called?

  1. impedance ✓ Correct answer
  2. inductance
  3. reactance
  4. resistance

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Question #372Basic Electricity and Electronics

A capacitor is constructed of two parallel:

  1. conductors ✓ Correct answer
  2. semiconductors
  3. inductors
  4. dielectrics

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Question #373Basic Electricity and Electronics

The material used between the plates of a capacitor is called its:

  1. insulation material
  2. dielectric material ✓ Correct answer
  3. separation material
  4. plate-divider material

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Question #374Basic Electricity and Electronics

In a power supply diagram, which block indicates a smooth dc output?

  1. transformer
  2. filter ✓ Correct answer
  3. rectifier
  4. regulator

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Question #375Basic Electricity and Electronics

A filtered full-wave rectifier voltage has a smaller ripple than does a half-wave rectifier voltage for the same load resistance and capacitor values because:

  1. there is a shorter time between peaks ✓ Correct answer
  2. there is a longer time between peaks
  3. the larger the ripple, the better the filtering action
  4. none of the above

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Question #376Basic Electricity and Electronics

The voltage where current may start to flow in a reverse-biased pn junction is called the….

  1. breakdown voltage ✓ Correct answer
  2. barrier potential
  3. forward voltage
  4. biasing voltage

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Question #377Basic Electricity and Electronics

In a power supply diagram, which block indicates a pulsating dc output?

  1. transformer
  2. filter
  3. rectifier ✓ Correct answer
  4. regulator

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Question #378Basic Electricity and Electronics

Which of the following circuits would require the least amount of filtering?

  1. A half-wave rectifier
  2. A full-wave rectifier
  3. A bridge rectifier
  4. A full-wave rectifier and a bridge rectifier. ✓ Correct answer

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Question #379Radio Theory and Communication Principles

The unit for frequency is the

  1. hertz ✓ Correct answer
  2. ampere
  3. watt
  4. second

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Question #380Basic Electricity and Electronics

What is the kilowatt-hour consumption of a 40 W lamp if it remains on for 1750 h?

  1. 43.75
  2. 70 ✓ Correct answer
  3. 43,750
  4. 70,000

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