Third Term

• Measurement of potential difference

  Voltage
• Source of voltage where chemical energy becomes electrical energy

  Battery
• Source of voltage where electromagnetic energy becomes electrical energy

  Solar Cells
• Source of voltage where mechanical energy becomes electrical energy

  Generators
• Continuous flow of electric charge (electrons)

  Electric Current
• Type of electric current where the charge flows in one direction. Example of this is battery-operated devices

  Direct Current (DC)
• Type of electric current where the charge flows in reversed direction. Example of this is the electric current in most buildings.

  Alternating Current (AC)
• These are materials through which electricity flows easily.

  Conductors
• These are materials through which electricity cannot flow easily.

  Insulators
• This is the opposition to the flow of charges in a material effected by thickness, length, and temperature

  Resistance
• V=IxR; where V is voltage (volts), I is current (amps), R is resistance (ohms)

  Ohm's Law
• The formula for finding the current

  I=V/R
• The formula for finding the resistance

  R=V/I
• It is an electronic measuring instrument that combines several measurement functions in one unit.

  Multimeter
• This is the needle-shaped rod that moves over the scale of a meter.

  Needle Pointer
• This part which is also known as the dial or infinity knob allows you to adjust the pointer to the zero position of the scale.

  Zero corrector or adjustment screw
• This is a control mechanism used to calibrate the meter’s needle or pointer to read zero when there is no measurable quantity being tested. It allows you to set the meter to a reference point of zero to ensure accurate measurement when testing various electrical parameters.

  Zero adjustment knob
• This allows you to adjust the settings of the multitester. Using this you can change what the multitester is measuring, as well as the range of measurement.

  Range selector switch
• This part allows you to quickly check if an electrical circuit is complete or if there is a break in the circuit.

  Continuity Test
• This is a set of measurement options or settings that allow you to measure AC voltages with different magnitudes.

  Alternating current voltage range
• This encompasses the predefined selection of voltage measurement settings tailored for measuring DC voltages.

  Direct current voltage range
• This refers to the range or set of voltage measurement options provided by the instrument. These scales are used to measure voltage or electrical potential difference in a circuit and are typically calibrated in volts or millivolts.

  Volt-meter scale
• This part encompasses the predefined selection of resistance measurement settings tailored for measuring electrical resistance. In an analog multimeter, this is represented by the different position of the range selector switch, often labeled as X1,X10, X1K, X10K, and so on.

  Ohm-meter range
• This is the most basic resistance scale.

  X1
• In an analog multimeter, this refers to the range or set of measurement options provided for measuring electrical resistance, often denoted in Ohms.

  Ohm- meter scale
• A Multimeter is an essential tool for electricians, electronics technicians, and engineers, as it allows them to perform a wide range of electrical measurements accurately.
• The range selector knob can only be auto ranging.
• The zero corrector is usually accompanied with the help of a flat head screwdriver.
• The name “infinity knob” comes from the fact that at 0 voltage, you have “infinite resistance”
• When you perform a continuity test, the multimeter emits a buzzing sound to indicate whether there is continuity or not.