Question Discussion & Solution

Hence, there is one such digit.

In this figure (i) shows that it moves 90 degree clockwise then get figure (ii). Similarly, In figure (iii) moves 90 degree clockwise then get next figure which is shown bellow -

Hence, option 2 is the correct answer.

The correct answer is chemical energy.

Key Points

• The dry cell is a type of electric battery which is used for portable electrical devices.
• Electricity is produced through the dry cells from electrochemical energy. Hence, Option 1 is correct.
• A common dry cell is a zinc-carbon cell.
• The electrolyte is immobilized as a paste by a dry cell, with just enough humidity in it to allow current to flow.
• Like a wet cell, a dry cell can work without spilling in any direction, because there is no free liquid in it.
• The versatility makes it ideal for mobile devices.
• The first wet-cell batteries, in comparison, were usually fragile glass containers featuring lead rods sticking from an open-top.
• Hence, they required careful handling to prevent spillage.
• The dry-cell battery development made a significant advance in battery safety and portability.
• Batteries render electricity from chemical energy.
• Batteries consist of one or more different parts, or cells, which contain an electrolyte called a chemical.
• Every cell has two electrodes that are electrically conductive immersed in its electrolyte.
• The electrodes consist of different materials; one releases electrons into the electrolyte, and the other absorbs them.
• Once an electrical system is attached to the electrodes, an electrical current passes through it and supports its operation with electric power.
• The energy contained in the dry cell is therefore in the form of chemical energy.

Additional Information

• Thermal energy
  • It is also called heat energy 
  • It is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other.
  • The energy that comes from the temperature of the heated substance is called thermal energy.
  • Thermal energy is energy that comes from a substance whose molecules and atoms are vibrating faster due to a temperature rise.
• In physical sciences, mechanical energy
  • It is the sum of potential energy and kinetic energy.
  • It is the macroscopic energy associated with a system.
  • The principle of conservation of mechanical energy states that if an isolated system is subject only to conservative forces, then the mechanical energy is constant.
• Nuclear power
  • It is the use of nuclear reactions to produce electricity.
  • Nuclear power can be obtained from nuclear fission, nuclear decay, and nuclear fusion reactions.
  • Presently, the vast majority of electricity from nuclear power is produced by nuclear fission of uranium and plutonium in nuclear power plants.

An ohmmeter is an electrical instrument that measures electrical resistance. Similarly, barometer is a scientific instrument that is used to measure air pressure in a certain environment.

The correct answer is Tinder.

• Tinder
  • Tinder is an American geosocial networking app.
  • It allows users to swipe to like or dislike other profiles based on their photos and common interests. 

​Additional Information

• Microsoft Edge
  • Microsoft Edge is a cross-platform web browser developed by Microsoft.
  • It was first released for Windows 10 and Xbox One in 2015.
  • Then for Android and iOS in 2017, for macOS in 2019, and as a preview for Linux in October 2020.
  • Edge includes integration with Cortana and has extensions hosted on the Microsoft Store.
• Mozilla Firefox
  • Mozilla Firefox, or simply Firefox, is a free and open-source web browser.
  • It was developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation.
• Internet Explorer 
  • ​Internet Explorer is a series of graphical web browsers developed by Microsoft and is included in the Microsoft Windows line of operating systems, starting in 1995.
  • It was first released as part of the add-on package Plus.