Also what about the question about the washing machine where it gave you a circuit with a transistor and you had to explain how the heating element would switch off?
Activity after 144 hours is what you had to calculate with the initial activity being 12kBq and the 36 hours half life meaning every 36 hours it halved so you half it 4 times to get 0.75kBq
Activity after 144 hours is what you had to calculate with the initial activity being 12kBq and the 36 hours half life meaning every 36 hours it halved so you half it 4 times to get 0.75kBq
What did you guys get for the question where they gave you a current/voltage graph and you had to comment on the resistance?
It was only one mark but i got confused :/
I mentioned that the resistance was increasing but not at a constant rate this is because of the temperature of of the lamp. I don't think I was specific enough though.
I wrote increase or decrease the resisitance (was meant to write the resistance of the variable resisitor) in order to gain different values of the current+voltage.
When resisitance goes up, current goes down and vice versa
I wrote increase or decrease the resisitance (was meant to write the resistance of the variable resisitor) in order to gain different values of the current+voltage.
When resisitance goes up, current goes down and vice versa
I just wrote the resistance will increase is that correct ?