physics corrections flashcards

every major ish correction from past papers i have done

Heating effect of current: explain why the coil of wire heats up when there is a current in it

• Coil has resistance

• Electrons transfer energy as they flow through the coil, heating it up

• This is due to electron collisions with lattice ions in the soil

What is an advantage of connecting bulbs in series?

Options:

• all the bulbs can be controlled with one switch

• the circuit is less likely to overheat

• uses lower voltage bulbs

How could you conduct an investigation to find a reliable value for refractive index?

• Direct light at a block at different angles or take repeat readings at a specific angle

• Take measurements of angle i and angle r; calculate values of refractive index, then take a mean

• plot a graph of sin i against sin r

• find the gradient to find the refractive index

what does the core of red super giant collapse to form?

a neutron star