MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
B. Humidity of air
Explanation
Humidity of air is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Hydroelectricity
Explanation
The term ‘white coal’ is sometimes referred to Hydroelectricity. The term white coal was used for Hydroelectricity, particularly in Europe, because of its capability to produce more energy than any other source except coal. The term was coined by a French Engineer Aristide Bèrges. Hydroelectricity is the application of hydropower to generate electricity. It is the primary use of hydropower today. Hydroelectric power plants can include a reservoir to exploit the energy of falling water or can use the kinetic energy of water as in run-of-the-river hydroelectricity. In addition to this, hydroelectric plants can vary in size from small community-sized plants to very large plants supplying power to a whole country. Geothermal energy: The heat that comes from the earth’s subsurface is known as geothermal energy. Wind Power: It is generated by the force that wind exerts on the blades of a turbine, causing the turbine’s shaft to rotate at a speed of 10 to 20 revolutions per minute (rpm). The rotor shaft is connected to a generator that converts mechanical energy into electrical energy. Biomass energy: A biomass energy source is one that is derived from organic matter.
Correct answer
B. Cataract
Explanation
Cataract is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Meteoroids
Explanation
Meteoroids is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Kangaroo rat
Explanation
Kangaroo rat is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. In asteroid belt between the orbits of Mars and Jupiter
Explanation
In asteroid belt between the orbits of Mars and Jupiter is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. 1235
Explanation
1235 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. 1 month
Explanation
1 month is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Pythagorus
Explanation
Pythagorus is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Positron
Explanation
The positron is the antiparticle to the electron. The positron has the same rest mass (m0) as the electron but opposite charge, one positive elementary charge.