JMI PHD ENTRANCE Paper 2024 and Answer Key

61. What do we call the temperature and pressure at which solid, liquid, and vapor phases of a particular substance coexist in equilibrium?

A. Equilibrium point

B. Triple point

C. Normal point

D. Elevation point

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62. The temperature of boiling water in a steam engine may be high because:

A. there are dissolved substances in water

B. there is low pressure inside the boiler

C. there is high pressure inside the boiler

D. the fire is at a very high temperature

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63. An alpha particle is the nucleus of an atom of:

A. Lithium

B. Hydrogen

C. Helium

D. Oxygen

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64. Which of the following radiations are used to treat muscle aches?

A. Microwaves

B. Infrared Rays

C. Ultraviolet Rays

D. X-Rays

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65. Dielectrics are

A. Non-conducting substances

B. Semi-conducting substances

C. None of the option

D. Conducting substances

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