## T5Edit

The **T5** section of the Technician test contains information on electrical principles, math for electronics, electronic principles, Ohm’s Law.

### T5AEdit

The**T5A**section covers electrical principles; current and voltage, conductors and insulators, alternating and direct current.

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#### T5A01

#### T5A02

#### T5A03

- What is the name for the flow of electrons in an electric circuit?
- Current

#### T5A04

- What is the name for a current that flows only in one direction?
- Direct current

#### T5A05

- What is the electrical term for the electromotive force (EMF) that causes electron flow?
- Voltage

#### T5A06

- How much voltage does a mobile transceiver usually require?
- About 12 volts

#### T5A07

- Which of the following is a good electrical conductor?
- Copper

#### T5A08

- Which of the following is a good electrical insulator?
- Glass

#### T5A09

- What is the name for a current that reverses direction on a regular basis?
- Alternating current

#### T5A10

- Which term describes the rate at which electrical energy is used?
- Power

#### T5A11

- What is the basic unit of electromotive force?
- The volt

### T5BEdit

The**T5B**section covers math for electronics; decibels, electrical units and the metric system.

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#### T5B01

- How many milliamperes is 1.5 amperes?
- 1,500 milliamperes

#### T5B02

- What is another way to specify a radio signal frequency of 1,500,000 hertz?
- 1500 kHz

#### T5B03

- How many volts are equal to one kilovolt?
- One thousand volts

#### T5B04

- How many volts are equal to one microvolt?
- One one-millionth of a volt

#### T5B05

- Which of the following is equivalent to 500 milliwatts?
- 0.5 watts

#### T5B06

- If an ammeter calibrated in amperes is used to measure a 3000-milliampere current, what reading would it show?
- 3 amperes

#### T5B07

- If a frequency readout calibrated in megahertz shows a reading of 3.525 MHz, what would it show if it were calibrated in kilohertz?
- 3525 kHz

#### T5B08

- How many microfarads are 1,000,000 picofarads?
- 1 microfarad

#### T5B09

- What is the approximate amount of change, measured in decibels (dB), of a power increase from 5 watts to 10 watts?
- 3 dB

#### T5B10

- What is the approximate amount of change, measured in decibels (dB), of a power decrease from 12 watts to 3 watts?
- 6 dB

#### T5B11

### T5CEdit

The**T5C**section covers electronic principles; capacitance, inductance, current flow in circuits, alternating current, definition of RF, power calculations.

Click "Expand" to reveal the questions.

#### T5C01

- What is the ability to store energy in an electric field called?
- Capacitance

#### T5C02

- What is the basic unit of capacitance?
- The farad

#### T5C03

- What is the ability to store energy in a magnetic field called?
- Inductance

#### T5C04

- What is the basic unit of inductance?
- The henry.

#### T5C05

#### T5C06

- What is the abbreviation that refers to radio frequency signals of all types?
- RF

#### T5C07

- What is a usual name for electromagnetic waves that travel through space?
- Radio waves

#### T5C08

- What is the formula used to calculate electrical power in a DC circuit?
- Power (P) equals voltage (E) multiplied by current (I)
- P=EI

#### T5C09

- How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?
- 138 watts

#### T5C10

- How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?
- 30 watts

#### T5C11

### T5DEdit

The**T5D**section covers Ohm's Law.

Click "Expand" to reveal the questions.

#### T5D01

- What formula is used to calculate current in a circuit?
- Current (I) equals voltage (E) divided by resistance (R)

#### T5D02

- What formula is used to calculate voltage in a circuit?
- Voltage (E) equals current (I) multiplied by resistance (R)

#### T5D03

- What formula is used to calculate resistance in a circuit?
- Resistance (R) equals voltage (E) divided by current (I)

#### T5D04

- What is the resistance of a circuit in which a current of 3 amperes flows through a resistor connected to 90 volts?
- 30 ohms

#### T5D05

- What is the resistance in a circuit for which the applied voltage is 12 volts and the current flow is 1.5 amperes?
- 8 ohms

#### T5D06

- What is the resistance of a circuit that draws 4 amperes from a 12-volt source?

#### T5D07

- What is the current flow in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?
- 1.5 amperes

#### T5D08

#### T5D09

#### T5D10

#### T5D11

#### T5D12

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