Physics Ch 22
Order by
21 terms
Terms | Definitions |
|---|---|
 Which bulb, when burned out, will cause all other bulbs to stop glowing? | A |
| If a resistor is added to a series circuit, the equivalent resistance...? | increase |
| If a resistor is added to a parallel circuit, the equivalent resistance...? | stays the same |
| The number of current paths in a series circuit? | 1 |
| A 10 Ohm resistor, 20 Ohm resistor, and 25 Ohm resistor are connected in series across a 110V supply. What is the current? | V=IR 110=(I)(55) I=2 |
| A 20 Ohm resistor and a 40 Ohm resistor are connected in series across a battery. The current is 2A. What is the voltage? | V=IR V=(2)(60) V=120 |
| A short piece of metal that melts when a large current passes through a what? | fuse |
| An auto switch that opens when the current reaches a set value is? | circuit breaker |
| Columb per second | Amp |
| Joule per second | Watt |
| Joule per columb | Volt |
| Volt per Amp | Ohm |
| Graph question | V/I =rise/run |
| 2 reasons why a house is wired in parallel | -lights in series get dimmer as more lights are added -if one light goes out in series, they all go out |
| Why don't insulators conduct energy? | Insulators do not allow electrons to move from atom to atom like conductors |
| What is the purpose of a fuse and circuit breaker and explain 2 ways a fuse differ from a circuit breaker? | They limit the amount of current that can travel through the walls. -fuse can't be reused -differ in way they disconnect |
| Why shouldn't you use multiple surge protectors with multiple outlets in your dorm room? | The more resistors, the more current, therefore, the hotter the wall |
| Describe 3 new things you learned from the lab | 1. do not test resistors when a power source is in the circuit 2. Test the current by wiring the multimeter in series 3. Test for voltage drop by wiring the multimeter in parallel |
| In order to carry electricity across long distances it is carried at higher voltage. Explain how this helps reduce joule-heating loss. | Loss of power because resistance in wire, prevent it by reducing the current by increasing the voltage |
| Name 3 of the 4 variable that affect electrical resistance | 1. material 2. length 3. temperature |
| Two resistors, 330 and 270 Ohms connect in parallel. A 120 Ohns is connected in series with arrangement. Battery=4.5V. Draw circuit, include ammeter that measured the V across the 330 resistor. Find current in 330 and voltage in 270. | yeah... |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.