The grade boundaries for an a* will not be anything below 70/80. The maths was relatively easy and there weren't any questions that required application of knowledge.
It was all textbook stuff to be honest.
My guess would be 72/80 for an a*.
I don't think so, it was never that low for an A*, and I doubt this year's exam was the easiest since 2009.
What did everyone write for the magnet moving up about the current?
I said that the velocity of rising is not constant because it's doing SHM, should have probably said accelerating upwards though, so rate of change of flux linkage is changing, potential difference changing thus current changing.
Didn't understand the conservation of charge because charge before=0 but after there was electron(-1) positron (+1) and also an electron ejected (-1) so Charge after = -1?
Didn't understand the conservation of charge because charge before=0 but after there was electron(-1) positron (+1) and also an electron ejected (-1) so Charge after = -1?
What did everyone write for the magnet moving up about the current?
This is what i put:
The rate that the flux is cut changes because the magnet was said to be accelerating from release. Therefore the Emf and therefore current values vary.