A) \[6\times {{10}^{2}}\,J\]
B) \[4.99\times {{10}^{7}}\,J\]
C) \[9.8\times {{10}^{6}}\,J\]
D) \[3\times {{10}^{4}}\,J\]
Correct Answer: D
Solution :
E = P × t \[=1000\,W\times 30\,\,sec=3\times {{10}^{4}}\,J\]
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