2021 physics mistakes

Question 1

what happens to mass in nucleur fusion

Answer 1

decreases

Question 2

what to do to decrease loos of thermal energy in SHC experiement

Answer 2

• ensure current is low to avoid temperature increase
• switch circuit off between readings

Question 3

a electric thermometer is better than manual

Answer 3

• less chance of misreading as position of eye does not affect the reading

Question 4

current x resistance

Answer 4

constant

Question 5

pressure x volume

Answer 5

constant

Question 6

if a switch isn’t correctly inserted in parallel

Answer 6

current in variable resisitor would be 0 as the switch has zero resistance. current = p.d/resistance. if reistance is 0, as we are dividing by reisistance pd will always be 0.

Question 7

why does a car need more energy than original to help it complete the loop

Answer 7

the car needs to be moving to complete the loop so more energy is needed

Question 8

why could a kite manage to become ionised and cause harm to a person holding it even if it dosent directly touch power cable

Answer 8

electric field strength is strong causing air to become ionised. thus the kite conducts the charge to earth

Question 9

how would a graph show specfic heat capacity

Answer 9

gradient

Question 10

how would a graph show specific latent heat of fusion

Answer 10

time that horizontal line indicating a state change is horizontal