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WorksheetsReview Electrical Energy and Electrical Power
Total questions: 10
Worksheet time: 15mins
The SI unit of electrical energy is …
Watt
Watt-hour
Ampere
Volt
The SI unit of electrical power is …
Watt
Watt-hour
Ampere
Volt
A 60 W lamp is used for 2 hours. The electrical energy used is …
30 Wh
60 Wh
120 Wh
180 Wh
Which formula to calculate the electrical power?
P = V I
P = I R I t
P = V^2/R
P = I R I
The correct relationship between energy (W), power (P), and time (t) is …
W = P ÷ t
P = W × t
W = P × t
t = P × W
An electric iron with a power of 400 W is used for 30 minutes. The electrical energy used is …
200 Wh
400 Wh
800 Wh
1200 Wh
A device operates at 220 V and draws a current of 2 A. The electrical power is …
880 W
440 W
220 W
110 W
Electrical power is the rate at which electrical energy is used.
True
False
Electrical energy is electric current
True
False
A television with a power of 100 W is used for 5 hours each day. The electrical energy used in one month is
5 kWh
10 kWh
15 kWh
20 kWh
