Thursday, 1 October 2020, 5:58 PM
Site: IMI eLearning
Course: IMI eLearning (IMI eLearning)
Glossary: Automotive Glossary
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Ammonia

A compound of nitrogen and hydrogen with the formula NH3. It is normally encountered as a gas with a characteristic pungent odour but can be included in a water based form into cleaning compounds for example.

Amperage

Strength of an electrical current in amperes.

Ampere (Amp)

Electrical unit for measuring the flow of electricity in a circuit.

Ampere-hour-rate

Discharge rate used to describe what a battery will produce. For example, a 40Ah battery will produce 2A for 20Hrs. The 20hrs is an agreed value used to allow comparisons to be made.

Amplification

An increased electrical voltage and/or current compared to say the original signal.

Amplifier

An electronic device that increases or allows an increased electrical voltage and/or current to flow.

Amplitude

The maximum distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path i.e. half the peak to peak value of a wave.

Amps

Short for Ampere (unit of electrical current)

Anaerobic

Used to describe a sealant that dries when air or oxygen is excluded.

Analog

A measuring process that uses a variable electrical current to provide a signal for computers and instruments.