prelim phys- electrical help (1 Viewer)

[greenlemings]

In a prac. Two globes were connected in parallel. The 2nd globe could only be turned on with a switch. It was also smaller and brighter than the first globe. how does the size of a light globe affect the brightness of it in a circuit? The voltage supply was 6V and the ammeter read 0.24A
Does the brighter globe have a higher/lower resistance than a dim globe?
thanks
diagram:
---------(voltmeter 6V)----------------|
| |
| |
|-----(supply 6V)----------------------|
| |
|---(globe)-------(ammeter-0.24A)---|
| |
| |
|--(globe)----(switch)-----------------|

thanks everyone

 

[Green Yoda]

cant really understand the diagram, can you post a pic?

 

[greenlemings]

View attachment physc prac 1 - Copy.zip

 

[greenlemings]

could u show full working out if you plan to calculate anything. thanks

 

[anomalousdecay]

As you can see, 0.24 A of current goes through globe 1 and 0.21 A of current goes through globe 2.

The voltage across each globe is the same at 6 V.

Hence, after using Ohm's law you can calculate that globe 2 has a higher resistance than globe 1.

 

[greenlemings]

thankyou

 

[greenlemings]

Also does size of globe affect the brightness, and why does globe 2 shine brighter even though it has a higher resistance and is smaller?

 

[anomalousdecay]

From the circuit it doesn't make sense to me

The globes must have completely different specifications. I suspect the filaments are different amongst other things.

 

[greenlemings]

ok thanks tho