A. 300.0W
B. 469.0W
C. 133.0W
D. 4.8W

Correct Answer: Option A

Explanation
Efficiency = power output/power Input
=> 80/100 = power output/1.5 x 250
i.e power output = (1.5 x 250 x 80)/100 =300w

SEE ALSO  Metal rods of length 20m each are laid end to end to form a bridge at 25°C. What gap will be provided between consecutive rails for the bridge to withstand 75°C? [Linear expansivity of the material = 2.0 x 10^-5K‾¹]

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