speed

[adrakdavra]

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For a given mass, if the current were decreased by a factor of 2, the exit speed would:
. increase by a factor of 2
. increase by a factor of 2
. decrease by a factor of 2
. decrease by a factor of 2

 

[Temperature101]

For a given mass, if the current were decreased by a factor of 2, the exit speed would:
. increase by a factor of 2
. increase by a factor of 2
. decrease by a factor of 2
. decrease by a factor of 2

Conservation of energy:

1/2mv^2 = V*I*t -----> mv^2 = 2 VIt -------> v = Sqrt (2VIt)/m ...

V = voltage, t = time , I = current.

 

[adrakdavra]

Conservation of energy:

1/2mv^2 = V*I*t -----> mv^2 = 2 VIt -------> v = Sqrt (2VIt)/m ...

V = voltage, t = time , I = current.

Thanks Temp it is hot in here

So is the answer C ?, which section is this, so I can read more about it.

 

[Temperature101]

Thanks Temp it is hot in here

So is the answer C ?, which section is this, so I can read more about it.

Yep the answer is C... I think it is chapter 3 in BR....

 

[GomerPyle]

Conservation of energy:

1/2mv^2 = V*I*t -----> mv^2 = 2 VIt -------> v = Sqrt (2VIt)/m ...

V = voltage, t = time , I = current.

Sorry..what is Vlt? The potential in a circuit or something?

 

[Temperature101]

Sorry..what is Vlt? The potential in a circuit or something?

Work done by the circuit... Power = W/t ----> W = P*t = V*I*t

 

[GomerPyle]

Work done by the circuit... Power = W/t ----> W = P*t = V*I*t

Oh duh okay. thx