# Calculating current Watch

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I don't understand what to do with this and also is that a lower-case delta? If so, what does it mean?

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#2

(Original post by

I don't understand what to do with this and also is that a lower-case delta? If so, what does it mean?

Posted from TSR Mobile

**goodwinning**)I don't understand what to do with this and also is that a lower-case delta? If so, what does it mean?

Posted from TSR Mobile

The symbol in the question looks like a very stylised (unusual) upper case omega, I have never seen it in quite that form before.

__The symbol for resistance is always__.

The question asks you to use logarithms which implies an exponential term is stated somewhere else in the problem. Is this part of an exponential decay or rise or perhaps in the context of a time constant?

Current I is simply 25/8 = 3.125 amperes.

Post the whole question so that the context can be understood and I can give a better answer.

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#3

**goodwinning**)

I don't understand what to do with this and also is that a lower-case delta? If so, what does it mean?

Posted from TSR Mobile

V=IR

R=V/I

to check your work.

ps I have a degree in electronic engineering.

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I know how to use Ohm's law but it's the other parts of the problem I don't understand like how to solve this using logarithms and that weird symbol (which has now been sort of explained).That's why I'm so confused what to do because it also says use logarithms and I don't even know how that's possible with the information given.

By the way, that is the whole question.

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By the way, that is the whole question.

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#5

(Original post by

I know how to use Ohm's law but it's the other parts of the problem I don't understand like how to solve this using logarithms and that weird symbol (which has now been sort of explained).That's why I'm so confused what to do because it also says use logarithms and I don't even know how that's possible with the information given.

By the way, that is the whole question.

Posted from TSR Mobile

**goodwinning**)I know how to use Ohm's law but it's the other parts of the problem I don't understand like how to solve this using logarithms and that weird symbol (which has now been sort of explained).That's why I'm so confused what to do because it also says use logarithms and I don't even know how that's possible with the information given.

By the way, that is the whole question.

Posted from TSR Mobile

Is this question from a text book? If so which?

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It's part of an assignment that I have to do for my course: I'm doing a BTEC level 3 in applied science. It's really annoying me because if I don't get all the answers in this assignment correct I won't get a distinction in the maths unit which is really important for me to get into uni.

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#7

(Original post by

It's part of an assignment that I have to do for my course: I'm doing a BTEC level 3 in applied science. It's really annoying me because if I don't get all the answers in this assignment correct I won't get a distinction in the maths unit which is really important for me to get into uni.

Posted from TSR Mobile

**goodwinning**)It's part of an assignment that I have to do for my course: I'm doing a BTEC level 3 in applied science. It's really annoying me because if I don't get all the answers in this assignment correct I won't get a distinction in the maths unit which is really important for me to get into uni.

Posted from TSR Mobile

Looks highly likely they used it in error and it's meant to be omega.

What is the maths question you are struggling with? It may make more sense to post it in here if it's physics based.

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#8

**goodwinning**)

It's part of an assignment that I have to do for my course: I'm doing a BTEC level 3 in applied science. It's really annoying me because if I don't get all the answers in this assignment correct I won't get a distinction in the maths unit which is really important for me to get into uni.

Posted from TSR Mobile

Please post the text/diagrams/instructions of the assignment leading up to this question.

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(Original post by

If it's "part of" an assignment it may be helpful if you could provide the rest of the context for this as it makes no sense on its own.

Please post the text/diagrams/instructions of the assignment leading up to this question.

**Stonebridge**)If it's "part of" an assignment it may be helpful if you could provide the rest of the context for this as it makes no sense on its own.

Please post the text/diagrams/instructions of the assignment leading up to this question.

There are no other text/diagrams/instructions. I'm not stupid enough to ask for help on a forum and not provide all the information I was given.

I have asked my brother, who is an electrical engineer, how to do this and he can't make sense of how to solve this with logarithms either and nor can my friends who are studying engineering.

Seems to me that this problem simply doesn't make sense and I'll just have to complain about it to my teacher.

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(Original post by

That's the assignment I was given and that was it. We weren't even provided with any resources on how to solve these either.

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**goodwinning**)That's the assignment I was given and that was it. We weren't even provided with any resources on how to solve these either.

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#12

It looks to me that Task 7 is just an exercise in using logarithms.

For part 7.2 find the logs of the two numbers, subtract (log 25 - log 8) and then find the antilog of the result.

Check the answer by doing the calculation directly =25/8

It's not really much to do with Ohm's Law. Just division using logs.

For part 7.2 find the logs of the two numbers, subtract (log 25 - log 8) and then find the antilog of the result.

Check the answer by doing the calculation directly =25/8

It's not really much to do with Ohm's Law. Just division using logs.

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#13

I deleted my last answer out of embarrassment.

I hate you Stonebridge! LOL

Spoiler:

Show

I like you really.

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#14

(Original post by

Stonebridge hits the nail on the head in his post #12.

I deleted my last answer out of embarrassment.

I hate you Stonebridge! LOL

**uberteknik**)Stonebridge hits the nail on the head in his post #12.

I deleted my last answer out of embarrassment.

I hate you Stonebridge! LOL

Spoiler:

Show

I like you really.

I've altered my answer slightly as I had the numbers in the fraction for I = V/R the wrong way round.

Spoiler:

I like you too.

Show

I like you too.

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Yeah, thanks a lot Stonebridge! 😄

It actually occurred to me in the beginning that you just might need to apply the logarithm law to it but when I was told (by a teacher no less) that symbol was a lower-case delta it threw me off. Still can't believe they put an astrology sign there.

Posted from TSR Mobile

It actually occurred to me in the beginning that you just might need to apply the logarithm law to it but when I was told (by a teacher no less) that symbol was a lower-case delta it threw me off. Still can't believe they put an astrology sign there.

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