# Which Graph is which

## Homework Statement

(1) Name the waveform(s) that represent a periodical current flow.

(2) Name the waveform(s) that represent a direct current.

(3) Name the waveform(s) that represent a non-periodical alternating current.

(4) Name the waveform(s) that represent a current with a non-positive average

Each letter can be used more than once or not at all. I find some graphs to be very tricky and confusing. For example, graph A looks like a direct current graph but it goes below the 0 line a little, causing me to doubt it. Graph E and G are very weird graphs for me as well.

## Homework Equations

No calculations required. Question only requires me to choose which graph fits which description.

## The Attempt at a Solution

My answers: 1) C, A, D
2) D, F
3) B, E, G
4) E

#### Attachments

• Screenshot_5.png
32.1 KB · Views: 255

SammyS
Staff Emeritus
Homework Helper
Gold Member

## Homework Statement

(1) Name the waveform(s) that represent a periodical current flow.

(2) Name the waveform(s) that represent a direct current.

(3) Name the waveform(s) that represent a non-periodical alternating current.

(4) Name the waveform(s) that represent a current with a non-positive average

Each letter can be used more than once or not at all. I find some graphs to be very tricky and confusing. For example, graph A looks like a direct current graph but it goes below the 0 line a little, causing me to doubt it. Graph E and G are very weird graphs for me as well.

## Homework Equations

No calculations required. Question only requires me to choose which graph fits which description.

## The Attempt at a Solution

My answers: 1) C, A, D
2) D, F
3) B, E, G
4) E
Hello, @jaximus . Welcome to PF.

I find it helpful for the full image to be shown in the post rather than just showing the thumbnail image, but other helpers may disagree with me.

#### Attachments

• screenshot_5-png[1].png
32.1 KB · Views: 139
Hello, @jaximus . Welcome to PF.

I find it helpful for the full image to be shown in the post rather than just showing the thumbnail image, but other helpers may disagree with me.

Alright, I'll keep that in mind. Thank you for the advice SammyS.

SammyS
Staff Emeritus
Homework Helper
Gold Member
Alright, I'll keep that in mind. Thank you for the advice SammyS.
OK.

If an average is zero, then it is non-negative, right?

OK.