Question : What are the main energy sources for Earth's internal heat engine?
Option 1: Radiogenic heat and oceanic tide heat
Option 2: The heat from volcanoes and solar heat
Option 3: Solar heat and oceanic tide heat
Option 4: Radiogenic heat and primordial heat
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Correct Answer: Radiogenic heat and primordial heat
Solution : The correct option is Radiogenic heat and primordial heat.
The planet's internal heat engine is fueled by heat from radioactive material decay and heat left over from Earth's birth. Radioactive atoms have energy that spontaneously escapes as gamma rays or very energetic subatomic particles. The radiogenic heat created by the radioactive decay of isotopes in the mantle and crust and the primordial heat remaining from Earth's origin are the two main sources of the about equal amounts of heat that flow from the planet's interior to its surface.
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Question : In which form is the supplied heat energy stored during change in temperature of substance?
Option 1: Heat energy
Option 2: Kinetic energy
Option 3: Potential energy
Option 4: Both kinetic and potential energy
Question : The process of photosynthesis involves conversion of
Option 1: chemical energy into radiant energy
Option 2: chemical energy into mechanical energy
Option 3: solar energy into chemical energy
Option 4: mechanical energy into solar energy
Question : dynamo is a device for converting
Option 1: heat energy into electrical energy
Option 2: mechanical energy into electrical energy
Option 3: megnetic energy into electrical energy
Option 4: chemical energy into electrical energy
Question : For a missile launched with a velocity less than the earth's escape velocity, the total energy is
Option 1: either positive of negative
Option 2: Negative
Option 3: Zero
Option 4: Positive
Question : Which State of India is leading in solar energy generation?
Option 1: Gujarat
Option 2: Rajasthan
Option 3: Haryana
Option 4: Uttar Pradesh
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