AC supply - Signal generator - CRO in circuits

[PhysicStud01]

Hello,
This problem is about a.c. I am used to simply using basic a.c. supply symbol in circuit diagrams.

Here, I need to draw the set-up for an experiment where I can change the frequency of the supply (not the voltage) and see how this affect the peak current through a coil.

how can i change the frequency and how do I measure it. I have never drawn circuits like that. Will the signal generator be part of the circuit or is it simply connected to the a.c. alone?

also, how would I measure the current. Won't an ammeter's pointer keep on oscillating or will I have the rms value? or should I use a cro?

I do not have any apparatus to try this, nor can I find any explanation about this in books?

 

[anorlunda]

how can i change the frequency and how do I measure it. I have never drawn circuits like that. Will the signal generator be part of the circuit or is it simply connected to the a.c. alone?

also, how would I measure the current. Won't an ammeter's pointer keep on oscillating or will I have the rms value? or should I use a cro?

Your questions are not about circuits, but the signal generator and the ammeter.

When you see the signal generator, there will be a knob or some other adjustment for frequency.

AC ammeters do not vibrate. There are many ways to measure DC and AC current. Read about them here https://en.wikipedia.org/wiki/Ammeter

 

[PhysicStud01]

Your questions are not about circuits, but the signal generator and the ammeter.

When you see the signal generator, there will be a knob or some other adjustment for frequency.

AC ammeters do not vibrate. There are many ways to measure DC and AC current. Read about them here https://en.wikipedia.org/wiki/Ammeter

in a circuit diagram, how do I show this?

 

[anorlunda]

There are no univeral symbols for those. You try a sketch and post it here with the UPLOAD button.

 

[PhysicStud01]

should there be a signal generator connected to the ac supply or can we obtain the frequency directly from an a.c supply?

 

[anorlunda]

Here is a picture of a typical variable frequency source. It needs to be connected to a source. Some models use a DC source, some use an AC source. You could show a picture like this on the schematic rather than a symbol.

I found the picture using this link
https://www.google.com/search?tbm=i...g...0..0j35i39j0i30j0i5i30j0i8i30.j8-jqMnYcbk

 

[PhysicStud01]

Here is a picture of a typical variable frequency source. It needs to be connected to a source. Some models use a DC source, some use an AC source. You could show a picture like this on the schematic rather than a symbol.

I found the picture using this link
https://www.google.com/search?tbm=i...g...0..0j35i39j0i30j0i5i30j0i8i30.j8-jqMnYcbk

thanks. So, I can use this independently, without a signal generator or cro to find the frequency?

 

[anorlunda]

without a signal generator

It is a signal generator. You set the frequency with knobs.

 

[PhysicStud01]

It is a signal generator. You set the frequency with knobs.

thanks. but are the values for V and I displayed on this generator rms values or peak values

 

[DaveE]

It is usually safe to assume that AC measurements are displayed as RMS values, unless stated otherwise.