1. Homework Statement
If the optical path diff between two light waves is lambda/2 will they always interfere destructively? if this in true then wherever one wave undergoes aphase change of pi at one surface and the second wave does not then these two will always interfere destructively...
Could someone please explain this question to me I'll include what I thought the answer was and the actual SQA answers.
Please can you read my answer just to see what I'm doing wrong and what I don't understand
It's from the 2009 past paper AH physics
Thanks so much I really appreciate any...
I don't know
using the left hand rule (I'm Scottish so I use negative current) surely the magnetic field due to one wire is up and due to the other one is down so they'd cancel?
Homework Statement
A resistor and a capacitor are connected in series to a variable frequency supply. A voltmerter is connected across the inductor and another across the resistor. The supply voltage is kept constant as frequency of supply is increased.
State and explain the changes in the...
I'm studying for my prelim and am trying to understand inductance better based on some questions I have done I've come up with these statements can anyone confirm they are true
the back emf in an inductive circuit at any given time equal to the voltage across the inductor
I initially thought...
could someone explain question 10. JUST PART b)iii)
http://mrmackenzie.wikispaces.com/file/view/AHpastpaper2004.pdf
I got the magnitude of the magnetic field
but I don't know how to find its directionI thought it might be to do with left and right hand rule?
the answer is upwards
could...
[moderator note: Removed and moved new question to new thread]
thanks for your reply :)
L opposes current and I think more turns creates a bigger back emf but I don't know why and I don't know what more turns does to L
I have never heard of time constant (I'm doing SQA Advanced Higher...
A d.c circuit consists of a switch, lamp and inductor.
The inductor is replaced with an inductor with twice the number of turns in the coil of wire, nothing else about it is changed.
State the effect on
A) maximum current
B) the time to reach max current
I thought increasing the turns would...
in my AH physics investigation - measuring acceleration due to gravity, I used the bifilar suspension pendulum btw a light gate was used
for the errors/problems section so far I have problems in making the rod level and keeping the two strings parallel, also all the random, calibration and...