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Electronics
Electronics Part 1
Question | Answer |
---|---|
Describe the electron flow theory | In electron flow theory, electrons flow away from areas of excess negative charge, to those with a deficiency of negative charge. |
Electrical pressure is known as what? | Volts |
What symbol represents volts? | A capital V. |
What is voltage also known as? | Electrical potential, or electromotive force. |
What would a technician use to measure voltage? | A voltmeter. |
What is current? | The rate of flow of electrons through a conductor. |
In what unit is current measured? | In amperes. |
What is the rate of flow of electrons through a conductor? | Current |
What is a ampere? | A measure of current, in which an ampere is defined as one coulomb of electrical charge flowing past a point in one second. |
What is the symbol for amperes? | A |
One coulumb is the amount of charge in _______ electrons. | 6.25 x 10^18 |
With what tool is current measured? | Using an ammeter |
What is a coulomb? | The fundamental unit of electrical charge. equal to the quantity of electricity conveyed in one second by a current of one ampere. |
What are the two types of electrical current? | Direct current and alternating current. |
What is direct current? | Direct current (DC) means that current only flows one way in a conductor. |
What is alternating current? | Alternating current (AC) is when the current flowing in a conductor changes direction (moves back and forth) many times in a second. |
In North America, alternating current is always delivered at...? | 60 cycles per second. (Or 60 hertz) |
What does Hz stand for? | Hertz |
What are hertz? | Cycles per second of a periodic phenomena |