Four electrical appliances are switched on for different durations of time. Which appliance consumes energy the most?

Appliance - A 3 kW kettle, Time - 10 min

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Appliance - A 100 W lamp, Time - 6 h

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Appliance - A 5 kW oven, Time - 2h

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Appliance - A 100 W lamp, Time - 24 h

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Solution

The correct option is C Appliance - A 5 kW oven, Time - 2h
Energy = Power $\times$ Time
Energy consumed is, therefore, given as
$A = (3 k W) \times (\frac{1}{6} h) = 500 W h$
B = (100W) $\times$ (6 h) = 600 Wh
C = (5kW) $\times$ (2 h) = $1 \times 10^{4}$ Wh
D = (100W) $\times$ (24 h) = 2400Wh

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Four electrical appliances are switched on for different durations of time. Which appliance consumes energy the most?

The correct option is C Appliance - A 5 kW oven, Time - 2hEnergy = Power × Time Energy consumed is, therefore, given as A=(3kW)×(16h)=500 Wh B = (100W) × (6 h) = 600 Wh C = (5kW) × (2 h) = 1× 104Wh D = (100W)×(24 h) = 2400Wh

The correct option is C Appliance - A 5 kW oven, Time - 2h
Energy = Power $\times$ Time
Energy consumed is, therefore, given as
$A = (3 k W) \times (\frac{1}{6} h) = 500 W h$
B = (100W) $\times$ (6 h) = 600 Wh
C = (5kW) $\times$ (2 h) = $1 \times 10^{4}$ Wh
D = (100W) $\times$ (24 h) = 2400Wh