Question

which use more energy, a 250W T.V. set in 1hr or a 1200W toaster in 10 minutes?​​

Answer 1

Answer:

Energy consumed by the TVset = 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.

Explanation:

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Answer 2

$\small\mathtt\pink{Energy\:consumed\:by\:an\:electrical\:appliance}$

$\small\mathtt\pink{is\:given\:by\:H=Pt}$

FOR THE TV:-

$\small\mathtt{Power\:W=250W}$

$\small\mathtt{Time\:t=1\:hour}$

$\implies$ $\small\mathtt{3600\:seconds}$

So,

$\small\mathtt{energy\:consumed\:H=250×3600=90000J}$

FOR THE TOASTER:-

$\small\mathtt{Power\:W=1200W}$

$\small\mathtt{Time\:t=10\:minutes}$

$\implies$ $\small\mathtt{600\:seconds}$

So,

$\small\mathtt{energy\:consumed\:H=1200×600=720000J}$

$\small\underline\mathtt\red{Hence,TV\:set\:uses\:more\:energy\:than\:toaster}$