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Which uses more energy, a \(250\ W\) TV set in \(1\ hr\), or a \(1200\ W\) toaster in \(10\ minutes\)?
 
The formula for energy consumption is
 
H=i×i
 
Energy consumed by a TV for an hour:
 
\(P\) \(=\) \(250\ W\)
 
Time, \(t\) \(=\) \(1\ hour\)
 
On converting hour to seconds, we get \(t\) \(=\)  \(s\)
 
[Note: Enter the answer as a whole number.]
 
The energy consumed by a TV for an hour is i×10iJ.
 
Energy consumed by toaster in \(10\ minutes\):
 
\(P\) \(=\) \(1200\ W\)
 
Time, \(t\) \(=\) \(10\ minutes\)
 
On converting minutes to seconds, we get \(t\) \(=\)  \(s\)
 
[Note: Enter the answer up to one decimal place.]
 
The energy consumed by a toaster for \(10\ minutes\) is i×10iJ.
 
Thus, theenergy consumed by the TV is the toaster.