For those talking about the electricity.... the PD across A and B couldn't be zero since the potential difference between the resistors was different. To get the marks you had to talk about the resistances staying constant so for a different pd the change in voltage across the sources remains the same.
For those talking about the electricity.... the PD across A and B couldn't be zero since the potential difference between the resistors was different. To get the marks you had to talk about the resistances staying constant so for a different pd the change in voltage across the sources remains the same.
Why does nobody understand that they calculate the grade boundaries based on the performance of the cohort such that the top 20% of candidates get an A the 10% below that get a B and so on. It depends on how well we all did and where abouts you fell in the cohort as a whole as to what your grade is... They don't just pluck these things out of thin air! So if we all found it difficult then they'll be lower because the mean score will be worse and if we all found it easy then they'll be higher
I put B as the lift cable, because it can be under a lot of force without too much extension. Plus, then it can be seen easier when it must be replaced as it will have extended rather than snapped and dropped a lift full of people to their death
For those talking about the electricity.... the PD across A and B couldn't be zero since the potential difference between the resistors was different. To get the marks you had to talk about the resistances staying constant so for a different pd the change in voltage across the sources remains the same.
THANK YOU, Someone else understands, exactly what i put