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## #1 2017-10-02 07:00:56

**hamidoon123****Moderator**- Registered: 2017-09-21
- Posts: 50,766

### Mathematically, % efficiency is defined as:

# 9th Class Punjab Board Exams Quizzes MCQs Quizzes Punjab Physics Online 9th Class Test Lesson 6 Work and Energy

**Question:**

Mathematically, % efficiency is defined as:

**Option A):**

Efficiency % =Work Output/ Work Input * 100**Option B):**

Efficiency % = ( input energy)/(output energy) x 100**Option C):**

Efficiency % = (work)/(time) x 100**Option D):**

Efficiency % = (required form or input)/(total output energy) x 100

**Correct Answer is Option A):**

Efficiency % =Work Output/ Work Input * 100

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## 2017-10-02 07:00:56

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