I'm currently doing Physics 12.
Its about electric fields, voltage, current, power, gravitation field and series, parallel and series-parallel circuits.
I've already taken the test once and got 48% because I didn't fully study the last section which involved series-parallel circuits.
Anyway its a total of 70 marks
34 marks Multiple choice (I got them all correct)
14 marks Series-parallel circuits calculations of voltage, current, resistance (I got none right)
22 marks about a cathode ray tube and deflection (I got none right)
So as you can see it seems like the last section of the course was the most important one.
The Attempt at a Solution
The multiple choice was completely understand and all correct. When I got to the series-parallel circuit questions I didn't know what to do because I didn't study that section yet and so lost 14 marks for nothing.
Next is the last part of the test worth 22 marks which I flunked completely and need your advice about:
A cathode ray tube with a voltage Va shoots itself in between two metal plates. The voltage between the plates is Vb. In front of the two metal plates is a screen. Its asking about deflection.
First there was a graph of Voltage versus deflection graph. Voltage on y-axis and deflection on x-axis
1.) Find the slope of the line. I didn't know where to start.
2.) What is the relationship between voltage and deflection?
3.) What is the deflection on the screen?
Those are the only questions I can remember but there is a lot more and I worded them to my memory.
Can anyone give any advice or references to a voltage versus deflection graph? It was Va and D.