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WorksheetsPower and Electric Energy
Total questions: 10
Worksheet time: 7mins
The unit of electrical power is ...
the watt
el watio
the wat
el vatio
Quina bombeta emetrà més llum?
Una de 20 W
Una de 50 W
Una de 1 W
Una alimentada amb 220 V i amb una intensitat de 0,1 A
The Power:
Is the speed with wich a job is executed
Is the energy done, divided by the time needed to do that work.
(Electrical Power) = V x I
All the answers are correct
Si tenemos un enchufe de 10 A. Calcula la máxima potencia del aparato eléctrico que podemos conectar, considerando que el voltaje es de 230 V
23 W
220 V
2,3 kW
2200 W
The device that measures the electrical power is the...
Volt-meter
Wattmeter
Ohmmeter
Reactivity meter
From the expression:
P=tEWe could know...
... that energy is the product of power by time
... that the time is the product of energy by power
... that the power is the product of energy by time
... that the power is time divided by energy
Calculate the energy consumed by a heater of 350W in 7 hours of working.
50 kWh
50 Wh
2450 W
2,45 kWh
En ambos circuitos las baterías están en serie
En el circuito de la izq. las bombillas están conectadas en serie
En el circuito de la der. las bombillas están conectadas en paralelo
Todas son correctas.
Calculate the energy in KWh consumed by a heater of 500W in 4 hours of working.
2 kW
4 kWh
2 kWh
2 000 kWh
The device that measures the electrical energy consumed is the ...
wattmeter
counter
polímetro
amperímetro
