gcse physics
current x resistance =?
Voltage
voltage = power divided by?
current
power = current(squared) x ?
resistance
work done = time x ?
power
power = energy transferred divided by?
time
charge flow = current x
time
energy transferred = current x ? x ?
voltage and time
energy transferred = ?
power x time
name 3 scalar quantities
temperature speed time
name 3 vector quantities
acceleration force displacement
which circuit is the current shared in
parrallel
which circuit do you add up the resistance for the total
series
what is a wavelength
distance between same points on two consecutive waves
what is amplitude
distance from peak to trough
what is frequency
number of waves that pass a point per second
what is a period
time taken for a whole wave to pass a single point
name 2 types of transverse waves
light or any electromagnetic waves
which way are the vibrations to the direction of travel
right angle
true or false do transverse waves have peaks and troughs
true
name a longitudinal wave
sound waves
true or false longitudinal waves only have rarefraction
false they have compressions and rarefractions
what is a rarefraction
when the waves are under minimum pressure
what effects transmission
how transparent an object is
what is the minimum amount of hz a human can hear
20 hz
what is the maximum amount of hz a human can hear
20khz
why do rough surfaces seem unreflective
because they scatter the light
true or false if a surface is smoother it wont reflect as well
false the smoother the surface the more reflective it is
if the angle of incidence is 30 degrees what is the angle of reflection
30 degrees as they are equal
when light enters a more dense medium does it move away or toward the normal
it moves toward the normal
name a hazard for a high dosage of uv
skin cancer
name a hazard for a high xray dosage
mutation of genes
name a ise of radiowaves
television
name a use of microwaves
cooking food
name a use of infrared waves
infrared cameras
name a use of visible light
fibre optics
name a use of uv
tanning beds
name a use of xrays and gamma rays
medical imaging
does a concave lens cave inwards
yes it does
which lens is thinner at the centre than the edges
concave
which is lens is wider at the centre than the edges
convex
which lens sends light inwards
convex
which lens sends light outwards
concave
which lens treats short sightedness
concave
which lens treats long sightedness
convex