electric energy and power

electric power

100

what is the SI unit of power?

Watt (W)

200

what is the formula of power?

P=U_xI

300

what is the formula of the power on a resistor?

P=R_xI²

electric energy

100

what is the SI unit of energy?

joule

200

what is the formula of energy?

E=P_xt

300

what is the formula of the energy of a resistor?

E=R_xI²_xt

indications on a device

100

what does the indication 210 V on the hair-dryer represent?

the rated voltage

200

what does 100 W on a lamp represent?

the rated power

300

define the term "rated voltage".

the voltage needed by the device to function normally.