I'm learning maybe pay attention to watts

[saturated]

So I got this bag of fuses (1A 250V) and they looked good but I thought hey why not check one of these things 

So I came up with a plan....put the fuse in circuit with a 10 ohm fuse and run it up to 10v
while keeping an eye on it.

Well I started at 7.9v and the smoke show started quickly
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So I did some calculations wow I was going for one amp I never dreamed I would be cranking out some watts
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That resistor is like a quarter or half watt.
 

Btw the fuse survived 

But as I type this now it makes sense why I see these big ceramic wire wound ? resistors and they are low resistance

 
 

[saturated]

I'm back with a five watt two ohm resistor

Holding steady at 0.5A

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Now on to 0.75A
 
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And feeling particularly bold 0.89A (eek )

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To boldly go....

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[Miyagi_83]

I really enjoy your sense of humor, man

[saturated]

The experiment has reached a conclusion

The one amp fuse opened at exactly 3v

1.5 amp 

I guess

[g1]

The datasheet for the exact model of fuse will tell you how much over current rating it can go before it blows (and for how long).

[saturated]

Does current have different speeds ?

Maybe that's what watts is all about ? 

Seems like current going through a low voltage drop would be slower than current going through a large voltage drop.

But then a bigger voltage drop would be bigger current.... through a bigger voltage ⚡ drop...seems like things could get out of hand in a hurry.

[J M Fahey]

Does current have different speeds ?

Maybe that's what watts is all about ? 

Seems like current going through a low voltage drop would be slower than current going through a large voltage drop.

No, current speed is the speed of light.

In our Audio world, instantaneous.

Current speed becomes relevant at very high Radio frequencies, think VHF and UHF

Back to fuses: they blow at higher or lower speed because it takes some time to heat wire enough to melt and open the circuit.

In your case, 1 Ampere rating means fuse will pass that current indefinitely with no problems.

As you go higher, it will eventually blow, faster and faster as you increase current.

As mentioned above, fuse datasheets show that.

[g1]

Generally, there are fast blow and slow blow fuses, for the reasons JM stated above.  But even among each type, the speeds vary, and will be shown in the datasheets.