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Current Electricity
| Question | Answer |
|---|---|
| What is electric current? | The movement of charge (electrons) through a conductor in a controlled way |
| What is needed to make electrons flow? | Electrical energy |
| What is needed for electrical energy? | A battery or generator which will cause electrons to move |
| How is electric current measured? | In amperes |
| One ampere is equivalent to? | One Coulomb of charge per second past a measuring point |
| How is electric current measured? | With an Ammeter |
| One ammeter in electrons? | 6.25 x 10^18 electrons/sec |
| One Coulomb in electrons? | 6.25 x 10^18 electrons |
| How do you use an Ammeter? | Must be hooked up in circuit so electrons flow through it (connected in series) |
| Electrical quantity symbol for a current? | I |
| Measurement symbol for Ampere? | A |
| Purpose of circuit breakers and fuses? | To prevent fires |
| How do circuit breakers and fuses work? | They are connected in a serie |
| What happens if too much current flows through wires? | The breaker/fuse breaks, creating open circuit (stops electricity) |
| What do you do when the circuit malfunctions? | Use ammeter to check current |
| How does the body use electrical impulses? | Brain controls body/muscles by using electrical impulses |
| What happens when the body is exposed to 0.001A? | Tingle |
| What happens when the body is exposed to 0.05-0.15A? | Contraction/convulsion and "let-go" threshold (cannot release object electrocuting you) |
| What happens when the body is exposed to 1-4.3A? | Heart stops |
| How much electricity is in a wall outlet? | 15A |
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