SATHEE: Work Energy And Power Question 198

Work Energy And Power Question 198

Question: An engine pumps up 100 kg of water through a height of 10 m in 5 s. Given that the efficiency of the engine is 60% . If $g = 10 m s^{- 2}$ , the power of the engine is [DPMT 2004]

Options:

A) $3.3 k W$

B) $0.33 k W$

C) $0.033 k W$

D) $33 k W$

Show Answer

Answer:

Correct Answer: A

Solution:

Work output of engine = mgh = $100 \times 10 \times 10 = 10^{4} J$

Efficiency (h) = $\frac{o u t p u t}{i n p u t}$

Input energy = $\frac{o u t u p t}{η}$

$= \frac{10^{4}}{60} \times 100 = \frac{10^{5}}{6} J$

Power = $\frac{input energy}{t i m e}$ = $\frac{10^{5} / 6}{5} = \frac{10^{5}}{30} = 3.3 k W$

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Work Energy And Power Question 198

Question: An engine pumps up 100 kg of water through a height of 10 m in 5 s. Given that the efficiency of the engine is 60% . If $g = 10 m s^{- 2}$ , the power of the engine is [DPMT 2004]

Options:

Answer:

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

Work Energy And Power Question 198

Question: An engine pumps up 100 kg of water through a height of 10 m in 5 s. Given that the efficiency of the engine is 60% . If g=10ms−2 , the power of the engine is [DPMT 2004]

Options:

Answer:

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

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Question: An engine pumps up 100 kg of water through a height of 10 m in 5 s. Given that the efficiency of the engine is 60% . If $g = 10 m s^{- 2}$ , the power of the engine is [DPMT 2004]