If three bulbs of 100 ; W, 60 ; W, and 40 ; W | vedclass

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Question

(D) $1$. Calculate the total power consumption per hour: $P_{	ext{total}} = 100 \; W + 60 \; W + 40 \; W = 200 \; W$.$2$. Calculate the total energy

Vedclass · Accepted Answer

$12 \; 	ext{units}$

Vedclass · Answer

(D) $1$. Calculate the total power consumption per hour: $P_{	ext{total}} = 100 \; W + 60 \; W + 40 \; W = 200 \; W$.$2$. Calculate the total energy consumed in $30 \; 	ext{days}$ in Watt-hours: $E = P_{	ext{total}} 	imes 	ext{time} 	imes 	ext{days} = 200 \; W 	imes 2 \; 	ext{hours/day} 	imes 30 \; 	ext{days} = 12,000 \; Wh$.$3$. Convert Watt-hours to units (kilowatt-hours): $1 \; 	ext{unit} = 1 \; kWh = 1,000 \; Wh$.$4$. Therefore, $E = 12,000 / 1,000 = 12 \; 	ext{units}$.

If three bulbs of $100 \; W$, $60 \; W$, and $40 \; W$ are used for $2 \; \text{hours}$ daily in a house, how many units of electrical energy are consumed in $30 \; \text{days}$?

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