Question Detail

PHY 102 Test Compilation PHY 102 3 Objective Question
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Question

Efficiency of motor: 240 V, 12 A, lifts 600 kg at 0.15 m/s.
Options
A 28.80%
B 88.2%
C 30.6%
Correct Answer
D 69.4%
Correct Answer

Option C is the correct answer.

Detailed Explanation

Input power = VI = 240×12 = 2880 W. Output power = Fv = mgv = 600×9.8×0.15 = 882 W. Efficiency = 882/2880 = 0.30625 = 30.6%.

Hint

Efficiency = (mgv)/(VI).

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 3
Type: Objective
Difficulty: Not specified
Question 324 of 1819
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