Question

Which Uses more energy a 250 watt TV set in 1 hour or a 1200 watt toaster in 10 minutes

Answer 1

WE KNOW THAT

P=E/T

POWER OF TV = 250WATT

TIME = 1HOUR=60×60=3600 SECONDS

POWER OF TOASTER = 1200 WATT

TIME = 10minutes = 10×60=600 SECONDS

TV

P=E/T

250=E/3600

E=3600×250

E=900000J or 900KJ

TOASTER

P=E/T

1200=E/600

E=1200×600

E=720000J or 720KJ

HENCE,ENERGY IS MORE IN TV THAN TOASTER.

Answer 2

Answer:

T. V. =900kJ, Toster=720kJ

Power=250W=250J/s

Time t=1h=3600second

Energy consumed by TV

=P×t

=250J/s×3600second

=900000

=900kJ

For toster

Power P=1200W=J/s

Time t=10Minutes=10×60=600second

Energy consumed by toaster

=P×t

=7200×600second

=720000

=720kJ

From above calculation 250 watt TV set in 1 hour use more energy than a 1200 watt toaster in 10 minutes

Please mark as a brainlist.....................