Question

Which uses more energy, a 250W TV set in 1 hr, or a 1200W toaster in 10 minutes?

Answer 1

Answer:

For T.V setPower (P) = 250w, Time (t) = 1hr=60×60=3600sFor ToasterPower (P) = 1200w, Time (t) = 10min=10×60=600sWe know that Energy (E) = P×t∴ Energy consumed by a TV set = 250 × 3600 = 9 × 105J∴ Energy consumed by a toaster = 1200 × 600 = 7.2× 105J∴ the energy consumed by a 250 W TV set in 1 h is more than the energyconsumed by a toaster of power 1200 W in 10 minutes....

Answer 2

SOLUTION:-

We know that Energy= Power × Time.

For TV set:

E1= 250W × 1× 3600sec.

=) 900000J

=) 9× 10^5 J

For toaster:

E2= 1200W × 10 × 60 sec

=) 720000J

=) 72× 10⁴

=) 7.2× 10^5 J

Therefore,

E1 > E2

Hence,

TV sets uses more energy.

Hope it helps ☺️