Paper 2 General Mistakes

Question 1

If they saw which one is more energy

Answer 1

There could be possibility where it’s the same energy so watch out for ORDER OF MAGNITUDE

Question 2

Rememebr alpha vs beta radiation, why do teacher need equipment for holding glass tube of these

Answer 2

Not for alpha as it will be absorbed

But for beta as it won’t

Question 3

Remember adding potentials and fields for electric

Answer 3

That for the field, find the magnitude of it and then draw arrow and then do vector

Scalar just add up

Question 4

Faraday law must say what , emf of current

Answer 4

Emf!

Question 5

Similarity for a sound wave progressive or stationary

Answer 5

Would be that they have longtidunal oscialltions

Question 6

When does capacitance change ONLY

Answer 6

ONLY IF E, A OR D CHANGE ELSE ITS ALWAYS CONSTSNT

hence if v changes then nothing else changes so it’s Q that changes

Question 7

Be careful about HOW MUCH CHARGE LEFT, vs how much discharge

Question 8

Why is energy lost in capacitor circuit

Answer 8

Current flows and energy lost in tedistance if the wired

Question 9

Remember if they say increase voltage, what happens to the energy stored, what to account for ( caps Tain etc the same)

Answer 9

Capacitance the same, hence CHARGE stored will increase too, so have to account for this

Question 10

WATCH OUT FOR DEPTH or whatever distance they want, won’t be as easy as you thrn, read qproperly

Question 11

How to explain in terms of photons
4 marks

Answer 11

Just say energy of x is less than work function, y is greater

Intensity indepent of energy, rwte if emission

Due to one to one interactions

Question 12

You can use BANW to find amx emf instead of grsdient!

Question 13

When finding potential whatever, DINT TAKE OUT TO FACTORISE, HAVE TO MU,TIPLY

Answer 13

Bevause you’re not adding so you can’t factorise!