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O Level Physics Practice Test 10

# Efficiency: O Level Physics MCQ Questions PDF - 10

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The MCQs: In a typical power station, amid a series of energy transfers and conversions, about 70% of the energy input gets wasted in the form of thermal energy, the efficiency of such a power station is about PDF, "Efficiency: O Level Physics" App (Android & iOS) Free with 0.4, 0.3, 0.7, and 1 choices for ACT subject tests. Practice energy, work and power questions and answers, Google eBook to download free sample for online bachelor degree programs.

## Physics MCQ: Efficiency: O Level Physics Quiz - 10

MCQ: In a typical power station, amid a series of energy transfers and conversions, about 70% of the energy input gets wasted in the form of thermal energy, the efficiency of such a power station is about

A) 0.3
B) 0.4
C) 0.7
D) 1

MCQ: Mass of oil is 11040 kg and the volume is 12 m³, its density would be

A) 92 kg m-3
B) 920 kg m-3
C) 9.2 kg m-3
D) 1.08 × 10-3

MCQ: When the state is being changed from gas to liquid through the process of condensation, the temperature

A) increases
B) decreases
C) remains constant
D) may increase or decrease

MCQ: Sound passes from one place to another in the form of

A) rays
B) waves
C) energy
D) light

MCQ: If a cup of tea at 50 °C is allowed to cool to room temperature, heat released would be (assume room temperature to be equal to 25 °C and heat capacity of the cup and tea to be = 5.0 kJ ⁄ K)

A) 25 kJ
B) 50 kJ
C) 125 kJ
D) 250 kJ

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