Q.

An electric motor operates with an efficiency of 90%. A pump operated by the motor has an efficiency of 80%. The overall efficiency of the system is

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a

85%

b

100%

c

72%

d

60%

answer is C.

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Detailed Solution

η=η1 x η2
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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Best Books for NEET
How to Join IIT after 10th
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