Which bulb, when burned out, will cause all other bulbs to stop glowing?
If a resistor is added to a series circuit, the equivalent resistance...?
If a resistor is added to a parallel circuit, the equivalent resistance...?
stays the same
The number of current paths in a series circuit?
A 10 Ohm resistor, 20 Ohm resistor, and 25 Ohm resistor are connected in series across a 110V supply. What is the current?
A 20 Ohm resistor and a 40 Ohm resistor are connected in series across a battery. The current is 2A. What is the voltage?
A short piece of metal that melts when a large current passes through a what?
An auto switch that opens when the current reaches a set value is?
Columb per second
Joule per second
Joule per columb
Volt per Amp
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
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.