The heat produced by a $100\, watt$ heater in $2$ minute will be equal to
A$12 \times {10^3}\,J$
B$10 \times {10^3}\,J$
C$6 \times {10^3}\,J$
D$3 \times {10^3}\,J$
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A$12 \times {10^3}\,J$
a (a) Energy $ = P \times t = 100 \times 2 \times 60 = 12000\,J = 12 \times {10^3}J$
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