Question Discussion & Solution

The correct answer is Rice.

• Rice blast disease, caused by Magnaporthe oryzae (Ascomycota), occurs in about 80 countries on all continents where rice is grown, in both paddy fields and upland cultivation.
• The extent of damage caused depends on environmental factors, but worldwide it is one of the most devastating cereal diseases, resulting in losses of 10–30% of the global yield of rice.
• Other common diseases of the crop of rice are - Blight, Bacterial leaf streak, Brown spot, Sheath blight, False smut, etc.

Additional Information

• The biological agents that causing diseases to plants are known as pathogens. 
• Some of the viral diseases in plants are - bud blight (soyabeans), Curly tops (Beans, tomato, etc.), Mosaic leaf (Tomato, pea, potato,tobacco, etc.).
• Some of the bacterial diseases in plants are - Blights (vegetable crops), Bacterial wilts (Tobacco, potatoes, etc), Cankers (Woody plants), Leaf Spots, Soft Wrots, etc.
• Some of the fungal diseases in the plants are - Cankers, Ergot, Rusts, Root rots, Scabs, Smuts, etc.
   

The correct answer is Mewar.

• The king and chieftain of Mewar gave Khurram the title of Shah Jahan in Badal Mahal on his arrival from Surat to Udaipur.

Key Points

Some important information about Khurram as follows- 

Additional Information

• Some of the battles between Mughals and Rajputs:
  • Siege of Bayana​
    • Rana Sanga led the Rajput army sieged the fortress of Bayana held by Nizam Khan in Feb 1527. 
    • Babur sent a detachment under Mohammad Sultan Mirza to relieve the fortress, the Mughal contingent failed to take the fort of Bayana.
  • Battle of Khanwa
    • Rajput Confederacy under Rana Sanga was defeated by Babur in 1527.
    • This was the largest battle ever that happened between the Mughals and Rajputs involving a total of more than 150,000 soldiers.
  • Siege of Chittorgarh
    • Akbar led the Mughal army besieged the famed Chittorgarh fort in 1567, which was then under command of Jaimal Rathore and Patta Singh Sisodia, commanders of Udai Singh.
    • The siege went on for 4 months and finally after the death of Jaimal, the fortress walls breached, that ensued Mughals emerged victoriously.
  • Siege of Ranthambore (1568)
    • Rao Surjan Hada had to surrender Ranthambore Fort to Akbar after later successfully put the fort under siege.
  • Battle of Dewair
    • The first battle of Dewair took place in 1582 between armies of Maharana Pratap and Mughal Garrison of dewair. Pratap's army defeated the Mughal army in this battle.
    • Maharana Amar Singh defended against the Mughal army led by Prince Parviz and Asaf Khan in 1606 resulted in stalemate. 

The correct answer is Solar cells.

Key Points

• A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect.
• Photovoltaic cells consist of two or more layers of semiconductors with one layer containing positive charge and the other negative charge lined adjacent to each other.
• Sunlight, consisting of small packets of energy termed as photons, strikes the cell, where it is either reflected, transmitted or absorbed.
• When the photons are absorbed by the negative layer of the photovoltaic cell, the energy of the photon gets transferred to an electron in an atom of the cell.
• With the increase in energy, the electron escapes the outer shell of the atom.
• The freed electron naturally migrates to the positive layer creating a potential difference between the positive and the negative layer.
• When the two layers are connected to an external circuit, the electron flows through the circuit, creating a current.
• Advantages of Photovoltaic Cells:
  • ​Environmental Sustainability
  • Economically Viable
  • Accessible
  • Renewable
• Disadvantages of Photovoltaic Cells:
  • ​The efficiency of solar panels is low compared to other renewable sources of energy.
  • Power generated gets reduced during cloudy weather.
  • Long-range transmission of solar energy is inefficient and difficult to carry.
  • Photovoltaic panels are fragile and can be damaged relatively easily.

First is managed by the second.

Thus, Jailor is the related to prison.

The logic followed here is :

Given expression is : 789 ÷ 689 + 13 – 25 × 1489

Replacing the signs as per the given directions and using the BODMAS rule:

789 - 689 ÷ 13 × 25 + 1489

789 - 53 × 25 + 1489

789 - 1325 + 1489

2278 - 1325

953

Hence, the correct answer is "953".