VCE Physics Question Thread!

[Floatzel98]

In gravitational, electric and magnetic fields, what is meant by a uniform field and a static field? What are the differences?

An example of a uniform and static magnetic field would be,
This field doesn't change in direction or intensity at any point, and it doesn't change in time. It is just a constant value in one direction for all times. The electric field of a charged parallel plate capacitor is uniform and static. But while it is being charged, it is no longer static, as the magnitude of the field (current) is changing in time.

[IonianDeo]

I am confused about 'Earth has a horizontal magnetic field'. What does it mean?
How do we know what part of a field line passes through the points P and Q from the solenoid?

[Bri MT]

I am confused about 'Earth has a horizontal magnetic field'. What does it mean?
How do we know what part of a field line passes through the points P and Q from the solenoid?

1. The solenoid is positioned relative to the Earth's surface in a manner such that the Earth's magnetic field goes left to right or right to left across the page

2. Use the right hand rule to draw the magnetic field produced by the solenoid.
You'll know which way the current is travelling through the solenoid because of the battery

[Seno72]

Hey guys. Is there a Physics ExamPro Trial Examinations and SACS?

[skrt skrt]

Hey AN, just got two physics questions

So if we have an AC power supply connected to a step up transformer which the voltage is transferred through transmission lines and then to a step down transformer, which values does the formula Vdelivered=Vsupply-Vdrop equate to. Using the notion that V1 and V2 are used for the first transformer and V3 and V4 is for the second transformer.
(2015 Q16 figure 2 for a visual)

What is the function of slip rings in the AC generator?
(looked at definitions didn't really get it)

Thanks

[S200]

What is the function of slip rings in the AC generator?
(looked at definitions didn't really get it)

Sorry, can't really help ya on the first part...

But slip rings just ensure that the current out stays as AC.
If you use split ring rather than slip rings, you would end up with DC.

[k.chen]

Just a quick question how do you work out maximum height, final vertical and horizontal velocity at landing of a asymmetric projectile motion when only provided with time and distance

[S200]

Just a quick question how do you work out maximum height, final vertical and horizontal velocity at landing of a asymmetric projectile motion when only provided with time and distance

Could you post the question K.Chen?

I would assume using one of Newtons formulae... Something with S (displacement) and T (Time) in it...

[skrt skrt]

pm me question and i could help

[S200]

pm me question and i could help

Just a bit of general knowledge...
You can't attach files to PM's.

[skrt skrt]

oh okay haha

[banksduyvu]

UNIT 4 - LIGHT

I don't quite understand why violet light refracts more than red light. Can someone please explain this phenomenon to me? Greatly appreciated ! 

[Floatzel98]

UNIT 4 - LIGHT

I don't quite understand why violet light refracts more than red light. Can someone please explain this phenomenon to me? Greatly appreciated ! 

For these cases, the refractive index (and phase velocity) is dependent on the wavelength/frequency of light. So each frequency will have a different refractive index for a given material. From Snell's law we can then see that different wavelengths will refract by different angles

[skrt skrt]

Quick question, does anyone know the best way to wrap cooper wire around a tube?? (for my practical)

Thanks

[S200]

Quick question, does anyone know the best way to wrap cooper wire around a tube?? (for my practical)

Thanks

I don't know the best way, but you could prolly jerry-rig the tube to a drill somehow?
Then, you can just hook one end of the wire to the tube, and then just hold the remainder firmly enough to give it some tension and wrap-direction...

Just an idea...