Tag: evs - i

Questions Related to evs - i

Wind turbines convert which of the following energy into mechanical energy?

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy

  1. Potential energy

  2. Kinetic energy

  3. Solar energy

  4. None of these

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Correct Option: B
Explanation:

Kinetic energy,

Wind turbines convert the kinetic energy in the wind into mechanical power. This mechanical power can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical power into electricity to power homes, businesses, schools, and the like.

Wind is beneficial resource as it doesn't cause pollution and it's ______. 

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy

  1. free

  2. rare

  3. steady

  4. costly

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Correct Option: A
Explanation:

Wind is a beneficial resource because it is a no-emissions energy source, so it produces no air or water pollution. Its operational costs are pretty low as wind is free. Wind energy is very efficient. Wind power is considered as a renewable energy resource. This means that the power generated from wind is replenished by the environment over relatively short periods of time.

The first windmill used for the production of electric power was built in which of the following countries?

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy

  1. France

  2. Scotland

  3. Switzerland

  4. Afghanistan

Show answer
Correct Option: B
Explanation:

The first windmill used for the production of electric power was built in Scotland in July 1887. It was built by Prof James Blyth of Anderson's College, Glasgow. Its height was 10 metres. Wind turbine was installed in the garden of his holiday cottage. It was used to charge accumulators developed by the Frenchman Camille Alphonse Faure, to power the lighting in the cottage. 

A solar cell converts:

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy conservation of fossil fuels

  1. heat energy into electrical energy

  2. solar energy into electrical energy

  3. heat energy into light energy

  4. solar energy into light energy

Show answer
Correct Option: B
Explanation:

Solar-powered photovoltaic (PV) panels convert the sun's rays into electricity by exciting electrons in silicon cells using the photons of light from the sun. This electricity can then be used to supply renewable energy to your home or business. Light striking a silicon semiconductor causes electrons to flow, creating electricity. Solar power generating systems take advantage of this property to convert sunlight directly into electrical energy. 

Plants store solar energy in the form of:

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy conservation of fossil fuels

  1. electric energy

  2. thermal energy

  3. chemical energy

  4. bio energy

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Correct Option: C
Explanation:

Plants trap the solar energy and convert it into chemical energy by the process of photosynthesis.This chemical energy in the form of carbohydrates or sugar is used as food.

The main source of energy for all living beings on earth is:

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy conservation of fossil fuels

  1. bio energy

  2. hydral energy

  3. wind energy

  4. solar energy

Show answer
Correct Option: D
Explanation:

Solar energy is the renewable source of energy which is essential for all living beings.All plant life needs solar energy to prepare their food by photosynthesis and the animal life is dependent on plants directly or indirectly.So it is the prime source of energy.

    What is the primary source of energy ?
evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy conservation of fossil fuels

  1. Tides

  2. Wood

  3. Cow dunk

  4. Sun

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Correct Option: D
Explanation:

The Sun is the primary source of energy for Earth's climate system is the first of seven Essential Principles of Climate Sciences. Principle 1 sets the stage for understanding Earth's climate system and energy balance. The Sun warms the planet, drives the hydrologic cycle, and makes life on Earth possible.Each second, more than four million tonnes of matter are converted into energy within the Sun's core, producing neutrinos and solar radiation.

Forms of energy of sun are:

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy conservation of fossil fuels

  1. wind energy

  2. bioenergy

  3. light and heat

  4. all of these

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Correct Option: C
Explanation:

The forms of energy from the sun are heat and light.

Which of the following is not a gaseous fuel?

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy

  1. CNG

  2. Coal gas and water gas

  3. Gobar gas and acetylene

  4. Liquid hydrogen.

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Correct Option: D
Explanation:
Solid fuels include peat, coal, wood, biomass.
Liquid fuels include petroleum, alcohol.
Gaseous fuel includes natural gas.
Liquid hydrogen (LH2 or LH2) is the liquid state of the element hydrogen.

Which one of the following is not a characteristic of a good fuel?

evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy

  1. No emission of smoke or harmful gases

  2. High ignition temperature

  3. High calorific value

  4. Not much ash(residue) after burning

Show answer
Correct Option: B
Explanation:
Characteristics of a good fuel are as follows:
1. Cheap and easily available.
2. Easy to store and transport.
3. Low ash content.
4. Should not produce any harmful substances.
5. High calorific value.
6. Moderate ignition temperature.