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; 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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Kinematics MCQs

Physical Quantities and Measurement MCQs

Thermal Properties of Matter MCQs

Transfer of Heat MCQs

Dynamics MCQs

Matter Properties MCQs

Turning Effect of Forces MCQs

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