AQA A-level Physics Paper 2 (7408/2) - 6th June 2024 [Exam Chat]

Is it because the switch has closed, so the magnetic field through Q is starting to decrease, so to oppose this change the current now flows through the other way?
I'm sorry I'm really bad at explaining, pis Imk if I need to clarify anything

Im confident theres gonna be 2 big magnetism questions tomorrow and i imagine a fair bit of nuclear physics

is NΦ just the symbol for flux linkage or do you actually multiply N by Φ, because then wouldn't the N's on both sides of the equation just cancel out?

nah that's the symbol otherwise the the equation would just become the formula for flux and not flux linkage

zero magnetic fields big questions in the last two years👀 surely right..

Do we have to remember nuclear density equation? if so what is it

guys how do I find resultant electric potential. PLS HELP!!

V = (1/4pi x epsilon not) x Q/r

for change in potential energy e.g GMm/r1 - GMm/r2 is r1 always the final distance the mass is at?

na bro, u know when you got like 2 charges on a line, and they ask the resultant potential?

na bro, u know when you got like 2 charges on a line, and they ask the resultant potential?

Electric potential is scalar. So you just add them up (I’m pretty sure correct me if I’m wrong)

Just add them up cause they're not vectors so there's no negative sign involved
edit: if two charges are opposite then you'll have to subtract one of them from the other.

ok so say u got a positive potential and a negative one yh, u just add the positive number and negative number?

so -V1+(-V2)?

so -V1+(-V2)?