Physics 9 Flashcards

Battery/source

Gives energy to coulombs

Conductor

Passes coulombs

Switch

Controls flow of coulombs

Where can switches be placed

Anywhere in series with the component they are controlling

Insulator

Component that does not pass coulombs

Ammeter

Counts coulombs per second

How are ammeters connected

In series

What does ammeters measure and in what units

Current, Amps

A voltmeter measures:

change in energy per coulomb

How are voltmeters connected

in parallel

What unit does voltmeter measure potential energy

volts

Resistor

Takes energy from coulombs and converts it into heat as current passes through

Example of resistor

Light bulb

Circuit

Chain that conducts coulombs

The flow of a current is ___ everywhere in a circuit

equal

Short circuit

A battery connected without resistors that causes coulombs to flow too fast and overheat

The voltage in this image for both voltmeters is

3V

IF we ignore the meters, how many paths are there?

One

If one bulb goes out, the current will go to ____ and the brightness of each bulb will ____

zero; go out

We can control the bulbs by placing the switch

Anywhere

Does it matter where the ammeter is placed in a series circuit, as long as it’s in series?

No

In a series circuit containing one bulb, the voltage is ____ to the voltage of the battery

Equal

In a series circuit containing two bulbs, the voltage will drop to ____

one half

In a series circuit containing three bulbs, the voltage will drop to ___ of the total voltage

one third

As you connect more bulbs in a series, the brightness of each bulb

decreases

As you connect more bulbs in a series, the size of the current

decreases

As you connect more bulbs in a series, the number of paths for the current

Increases

In a series circuit, if one light bulb burns out, the current goes to

Zero

In a series circuit, of a bulb burns out, the brightness of the remaining bulbs go to

Zero

Fuses act like ___ to open if a _________ occurs.

Switches, short circuit

Fuses must be connected

in series

Parallel circuit

when bulbs are connected side by side so the current divides at a branch point,

total Voltage?

6V

Voltage of the lightbulb?

6V

the current for each light bulb is _____

the same

If more bulbs in a parallel circuit are added, the brightness of the bulbs will

remind the same

If more bulbs are added in a parallel circuit, the ammeter’s total reading will

go upW

What is the total ammeter reading?

6A

If more bulbs are added in the parallel circuit, the number of paths for the current will

increase

If more bulbs are added in a parallel circuit, the amperage of each branch will

remain the same

If one bulb goes out in a parallel circuit, the other bulbs will

remain the same

If one bulb goes out in a parallel circuit, the main ammeter reading will

decrease

If one bulb goes out in a parallel circuit, the current in the branch circuits will

remain the same

Is there a parallel circuit where one branch gets all the current while the others get none?

Only in a short circuit