time taken for the mass or activity of a sample of a radioactive isotope to decay t half its
value.
region where a charged object experiences a force due to the presence of another
charged object.
electric shock
lazer printers
10+10= 20 V
8s
f=1/T
1/8= 0.125Hz
the energy required to change 1 kg substace by 1 degree temperature
the energy required to change a substance by 1 degree temperature
C= c x m
Force is directly proportional to extension given that the elastic limit is not exceeded.
primary coil
iron core
primary voltage
secondary coil
step-up transformer
Vp/Vs = np/ns