Class 9 Physics MCQs – Practice Test 15 (Chapter 9)

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Work and Energy Quiz with 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

Work and Energy Quiz App & e-Book – Class 9 Physics Study Material

Kinematics MCQs

Thermal Properties of Matter MCQs

Matter Properties MCQs

Work and Energy MCQs

Physical Quantities and Measurement MCQs

Transfer of Heat MCQs

Turning Effect of Forces MCQs

Dynamics MCQs

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