Question : The device used to convert solar energy into electricity is:
Option 1: Photovoltaic cell
Option 2: Daniel cell
Option 3: Electrochemical cell
Option 4: Galvanic cell
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Correct Answer: Photovoltaic cell
Solution : The correct option is Photovoltaic cell.
A photovoltaic cell, often known as a solar cell, is an electronic device that transforms light energy into electrical energy. It is a semiconductor device that generates an electric current by using the photovoltaic effect. The photovoltaic effect is the process of converting light into electrical energy. When light strikes a semiconductor, electrons are stimulated and migrate from the valence band to the conduction band. This generates an electric current that can power gadgets. Semiconductor materials, such as silicon, are used to make photovoltaic cells.
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Question : The process of depositing a layer of any desired metal on another material using electricity is called _________.
Option 1: electroplating
Option 2: galvanisation
Option 3: rusting
Option 4: crystallisation
Question : The induced current is highest when the direction of motion of the coil is:
Option 1: Not at right angles to the magnetic field.
Option 2: At right angles to the electricity.
Option 3: At right angles to the electric source.
Option 4: At right angles to the magnetic field.
Question : Copper wires are generally used for electrical power transmission instead of iron wire because:
Option 1: Copper is cheaper than iron
Option 2: Copper is lighter than iron
Option 3: Copper is a good conductor of electricity than iron
Option 4: Copper can take higher power than iron
Question : What is the priority zone of the AMRUT (Atal Mission for Rejuvenation and Urban Transformation) mission, which was launched by the Government of India in 2015?
Option 1: Water supply followed by sewerage
Option 2: Electricity and power generation
Option 3: Primary education for all
Option 4: Health care of urban dwellers
Question : In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
Our beautiful ecosystem is being systematically (1)____ by industrial pollution channelled into rivers like the Ganga and the Yamuna, nuclear wastes from atomic plants muted into the world’s oceans, and (2)____ gases such as carbon dioxide mixed with the ozonosphere. Besides, tropical rainforests and green pastures are disappearing (3)_____ the pressure of a proliferating population. Dams are being (4)_____ over the rivers like the Narmada to change nature’s well-balanced surface equations between flora and fauna, and sloping mountainous terrain is being converted into mini oceans to supply electricity to the ever-starving industrial stomach of our age. Elephants, tigers, the wild rhinos of South Africa and many other forest creatures have become (5)_____ species.
Question
Select the most appropriate option to fill in the blank number 3.
Option 1: in
Option 2: to
Option 3: on
Option 4: under
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