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Physics CT2 - Coggle Diagram
Physics CT2
Ohm's law
potential difference: It is the work done per unit charge
potential difference=workdone/charge
V=W/Q
V=potential difference (V)
W=Work done (J)
Q= Charge (C)
Resistance opposes current
Higher the resistance the lower current
Higher the current the lower the resistance
the current is directly proportional to the voltage at constant temperature
Dangers of radioactivity
Irradiation
Being exposed to radioactive particle. But irradiation will stop if you move away .
contamination
If you have radioactive particles in or on your body. You will be continuously irradiated
charge and current
Charge
Is a physical property of matter that causes a force when placed near another charge
current
is the rate of flow of charge
it is measured in ammeters (amps
1A is 1 coulomb of charge in 1 second
Q=IT
Q=Charge C
I=current A
T= Time S
Half life
The time taken for the activity of a radioactive isotope to reduce by half