Recent content by Glenjamin

Anyone know where i can get some past paper solutions

Q 19 i don't mind cos u just have to mentions newtons laws and how do they relate to space travel for spaceships if i get a q like 27 definately will be pulling out straws

Compare the model for the conduction of electricity in metals at room temperature with the model of the conduction of electricity in superconductors below the critical temperature

Yeh for N type semiconductors according to the hole theory there are more electrons than there are holes which means there's spare electrons which means it can conduct better as more electrons are moving from the valance band to the conduction band For P typle semiconductors there is more holes...

The band theory explains why semiconductors can conduct in some circumstances and the hole theory (with p and n ) explains how... im pretty sure thats right

i think that q has been asked already oldskoolkid

The slingshot effect is when space probes use a planet's gravitational pull as a velocity boost. the probe accelerates as its gets pulled by a planet's gravitational pull and then as it passes it reduces its speed relative to the planet but relative to the sun it has increased Describe...

Ok that makes perfect sense now thanks

I have difficult understanding how DC generators work. The principle for them to work is that When a coil of wire is moved through a magnetic field, the electrons in the wire are forced to move creating a current flow. I understand this but what i don't understand is how the coil of wire...

Ok am i right in saying that motors convert electrical to mechanical energy and generators its vice versa where its concerts mechanical to electrical am i right in saying in dc motors an electric current flows through the wires of the rotor (armature) and this makes the armature spin which is...

Ok i stumbled across the 2007 q 25 " A student claimed that a DC generator is an electric motor in reverse Analyse this claim with reference to structure and function of a simple DC motor generator and an electric motor" Help me

2a) Delta Y = Uyt + .5ayt^2 20 = 4.9t^2 2.02 = t therefore Delta x = Uxt 25 = Ux (2.02) 12.376 = Ux

ok let me gets this straight, The split ring allows for the rotor to continually rotate 360 degrees as if it wasn't for the split rings the rotor would rotate 180 then flip back? This maximises the torgue which allows for more current to be induced?... also alows for current to flow in one...

Yes can u please explain the differences between the two for induction motors

Umm i think u should discuss how it developed to what it is now and whats the current definition of the principle of relatively I think u should how Galileo initially propose the theory of relatively by stating that "all steady motion is relative and cannot be detected without a reference to a...