MEASURING ELECTRICITY

Fill in the blanks in the tables below.



TABLE 1

VOLTAGE = CURRENT X RESISTANCE
1.5 V = A X 3 Ω
V = 3 A X 4 Ω
120 V = 4 A X Ω
240 V = A X 12 Ω

TABLE 2

POWER = VOLTAGE X CURRENT
27 W = 9 V X A
W = 120 V X 1.5 A
45 W = V X 3 A
W = 120 V X 2 A

TABLE 3

APPLIANCE POWER = VOLTAGE X CURRENT
TV 180 W = 120 V X A
COMPUTER 40 W = 120 V X A
PRINTER 120 W = 120 V X A
HAIR DRYER 1000 W = 120 V X A

TABLE 4

POWER X TIME = ELECTRICAL ENERGY (kWh) X PRICE = COST
5 kW X 100 h = kWh X $0.125 = $
25 kW X 4 h = kWh X $0.125 = $
1000 W X 1 h = kWh X $0.125 = $