Class 9 Physics MCQs - Chapter 9

Work and Energy Quiz Questions & Answers PDF Download - 15

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The Quiz: A system which gives an output equal to the total energy used by it is called; "Work and Energy" App (iOS, Android) with answers: non-ideal system, negative system, ideal system, and slow system for online certificate programs. Study Physics Efficiency MCQ Questions, download Amazon eBook (Free Sample) for taking online classes.

Work and Energy Exam Questions and Answers PDF Download: Test 15

MCQ: 71

A system which gives an output equal to the total energy used by it is called

negative system
non-ideal system
ideal system
slow system

MCQ: 72

The main source of heat is

moon
stars
sun
Mars

MCQ: 73

Kinetic energy with mass ‘m’ and velocity ‘v’ is

2 mv²
1/2 mv
2m ⁄ v²
1/2 mv²

MCQ: 74

The ratio of required form of energy obtained from a system as output to the total energy given to it as input is called its

efficiency
power
stress
strain

MCQ: 75

The SI unit of power is

joules
newton
watt
omega

Class 9 Physics Mock Tests

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