Question Discussion & Solution

The correct answer is Western disturbances.

Key Points

• Western Disturbances are responsible for the rainfall during winter over the northwestern part of India.
• The Western Disturbance originates in the mid-latitude region near Europe and the Atlantic Ocean.
  • The low pressure builds up over the Mediterranean Sea and moves over Iraq, Afghanistan, and Pakistan before entering India, and contains substantial amounts of moisture.
  • When these low-pressure systems reach the Indian subcontinent, they are blocked by the Himalayas and rain as snow over the northwestern plains and the higher reaches of the western Himalayas.
  • After precipitation over northwest India, they weaken and are devoid of moisture, they blow as dry winds that form dense fog over the northern plains of India.

Additional Information

• The period June to September is referred to as the Southwest Monsoon period.
  • Southwest Monsoon period is the principal rainy season for the Indian subcontinent.
  • This is the summer monsoon period where the southwest monsoon holds away over the country.
  • The whole country receives nearly 75% of its rainfall during this period.

The correct answer is Microphone.

• ​A microphone is an input device, which is used to save a person's voice on a computer.

Key Points

• Microphone
  • The microphone is a device connected to a computer (via an audio interface or another analog-to-digital converter).
  • It sends/inputs information into the computer.
  • This means microphones are input devices.

​Additional Information

• Speaker
  • Speakers are one of the most common output devices.
  • The purpose of speakers is to produce audio output that can be heard by the listener.
• Scanner
  • ​A scanner is an input device that scans documents such as photographs and pages of text.
  • When a document is scanned, it is converted into a digital format. 
• Joystick
  • ​A joystick is an input device.
  • It can be used for controlling the movement of the cursor or a pointer in a computer device.

The correct answer is 740 meters.

• The approximate height of Dhosi hill above sea level is 740 meters.

Key Points

• Dhosi hill
  • ​Dhosi Hill is an extinct volcano.
  • It is standing alone at the northwest end of the Aravalli mountain range, of which it is a part, with height varying from about 345 to 470 meters from the surrounding land.
  • It is 740 meters from sea level. 
  • Dhosi Hill is located on the borders of Haryana and Rajasthan.

Additional Information

Top 3 Major mountain peaks of the Aravali Ranges of Rajasthan:

The correct answer is Afforestation.

• Afforestation is not a cause of soil erosion.

Key Points

• Afforestation is planting trees on an area of land in order to form a forest.
• Removal of the top layer of soil when it is exposed to wind and rain is easily blown or washed away. This condition is known as soil erosion.
  • Basically, the soil cover is removed by two powerful agents– (i) Running water, (ii) Wind.
• Deforestation, overgrazing, floods, Landslides and heavy rainfall have led to soil erosion.

The correct answer is 100.

• 100 per cent share of the Central Government in the 'Sambhar wetland project' under the Twelfth Five Year Plan (2012 - 2017).

Additional Information 

• The objectives of the Twelfth Five-Year Plan were:
  • To create 50 million new work opportunities in the non-farm sector.
  • To remove gender and social gap in school enrolment.
  • To enhance access to higher education.
  • To reduce malnutrition among children aged 0–3 years.
  • To provide electricity to all villages.
  • To ensure that 50% of the rural population has access to proper drinking water.
  • To increase green cover by 1 million hectares every year.
  • To provide access to banking services to 90% of households.