Question Discussion & Solution

Concept:

• Any battery (actually it may have one or more than one cell connected in series) or cell that we use as a source of electrical energy is a galvanic cell where the chemical energy of the redox reaction is converted into electrical energy. 
• In the primary batteries, the reaction occurs only once, and after use over some time battery becomes dead and cannot be reused again.
• The most familiar example of this type is the dry cell (known as Leclanche cell after its discoverer) which is used commonly in our transistors and clocks. 
• The cell consists of a zinc container that also acts as anode and the cathode is a carbon (graphite) rod surrounded by powdered manganese dioxide and carbon.
• The space between the electrodes is filled by a moist paste of ammonium chloride (NH4Cl) and zinc chloride (ZnCl2). 

Explanation:

• The cell consists of a zinc container that acts as the anode.
• The cathode is a carbon (graphite) rod surrounded by a cathodic material powder of manganese dioxide and carbon.

So, The positive pole of the dry cell is made up of C (carbon).

The correct answer is Musca domestica.

• The scientific name of Housefly is Musca domestica.

Additional Information 

The correct answer is Register, Cache, RAM, Hard disk.

• Register

• RAM 
  • RAM is a hardware element where the data being currently used is stored.
  • It is a volatile memory.
  • Two types of RAM are
    • Static RAM, or (SRAM) and
    • Dynamic RAM, or (DRAM).
• Register
  • A register holds instructions or data that the processor is working on or will be working on shortly.
  • They form part of the processor and are capable of holding only one item at a time.
• Cache 
  • Cache memory is an area in the computer where codes and instructions are stored.
• Hard disk
  • A hard disk drive is an electromechanical data storage device that stores and retrieves digital data using magnetic storage.

• There are four major storage levels on the computer:
  • Internal –
    • Processor registers and cache.
  • Main –
    • The system RAM and controller cards.
  • On-line mass storage –
    • Secondary storage.
  • Off-line bulk storage –
    • Tertiary and Off-line storage.

After reading statement and conclusions we decide that -

i) All women are scientists.→ False 

ii) All scientists are women.→ False

Hence, option 4 is the correct answer.

The correct answer is MICR.

Key Points

•  MICR- Magnetic Ink Character Recognition
  • It is a technology used primarily to identify and process checks.
  • The MICR on a check is the string of characters that appears at the bottom left of the check.
  • It consists of three groups of numbers, including the bank routing number, the account number, and the check number.

Additional Information

•  OCR- Optical Character Recognition
  • It is a widespread technology to recognize text inside images, such as scanned documents and photos.
  • It is used to convert virtually any kind of image containing written text (typed, handwritten, or printed) into machine-readable text data.
• OMR- Optical Mark Recognition
  • It is the process of reading information that people mark on surveys, tests, and other paper documents.
• IFSC- Indian Financial System Code
  • It represents the 11 digit character on our bank’s cheque leaves, or other bank-sponsored material.
  • This 11 character code helps identify the individual bank branches that participate in the various online money transfer options like NEFT and RTGS.