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Which uses more energy: a 250W TV set in 1 hour or a 1200W toaster in 10 minutes?
Which uses more energy: a 250W TV set in 1 hour or a 1200W toaster in 10 minutes?
CBSE | Class 10 | Electricity | Lakhmir Singh | Physics
Which uses more energy: a 250W TV set in 1 hour or a 1200W toaster in 10 minutes?

Answer:

1st case: TV set

Given,

P = 250W

= 0.25kWh

T = 1 hour

Thus, we get

Energy consumed, E = PT = 0.25kWh

2nd case: Toaster

Given,

P = 1200W

= 1.2kW

T = 10 min = 1/6 hour

Thus, we get

Energy consumed, E = PT = 0.2kWh

As a result, it may be inferred that television consumes more energy.

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