IGCSE O Level Physics Practice Test 10

Efficiency: O Level Physics MCQs (Multiple Choice Questions) PDF Download - 10

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Efficiency: O Level Physics MCQ with Answers PDF Download: Quiz 10

MCQ 46:

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

MCQ 47:

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

92 kg m^-3
920 kg m^-3
9.2 kg m^-3
1.08 × 10^-3

MCQ 48:

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

increases
decreases
remains constant
may increase or decrease

MCQ 49:

Sound passes from one place to another in the form of

rays
waves
energy
light

MCQ 50:

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)

25 kJ
50 kJ
125 kJ
250 kJ

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