Question Discussion & Solution

Concept:

The different types of motion are described in the below table.

Explanation:

• When a tight string is stretched, we can see the string is moving up and down at a very fast speed.
• It may be so fast, we cannot predict the exact location of the string for a while.
• This type of phenomenon is called vibration and such motion is called vibrational motion. 
• This can also be observed while playing the guitar. 
• The guitar strings vibrate when pulled while playing it. 

The correct option is vibrational.

The correct answer is Vitamin B1.

Key Points

• When rice is produced and not polished it is called brown rice. 
• Brown rice is rich in Vitamin B1. 
• When brown rice is polished, rice loses many vitamins and minerals including Vitamin B1 through the bran.
• Vitamin B1 also called thiamine is an essential vitamin, a deficiency of which is known to cause beriberi.

Additional Information

The correct answer is 1526.

• The first battle of Panipat was fought in 1526.

Key Points

• The First Battle of Panipat (21 April 1526) fought near a small village of Panipat Haryana.
• The battle was fought between the invading forces of Zahir-ud-din Babur and Lodi Empire during the rule of Ibrahim Lodi.
• The Mughal forces of Babur, the ruler of Kabulistan, defeated the ruling army of Ibrahim Lodi, Sultan of Delhi.
• Babur’s tactics of Tulughma and Araba led him to victory.

Additional Information

• Tulughma: it means dividing the whole army into various units, viz. the Left, the Right and the Centre.
• Araba: The centre forward division was then provided with carts which were placed in rows facing the enemy and tied to each other with animal. 
• The Second Battle of Panipat was fought between the forces of Samrat Hem Chandra Vikramaditya and  the army of Akbar, on November 5, 1556
• The Third Battle of Panipat took place on 14 January 1761, at Panipat between the Maratha Empire and the King of Afghanistan, Ahmad Shah Durrani.

The pattern follows:

(A + 4)(B + 4) = EF

(E – 2)(F – 2) = CD

(C + 4)(D + 4) = GH

(G – 2)(H – 4) = EF

(E + 4)(F + 4) = IJ

(I – 2)(J – 4) = GH

Here each term follow +4.

Concept:

ER model describes data as entities, relationships, and attributes. It is a high-level conceptual data model. This model is used to define the data elements and relationships for a specified system.

Entity:

The entity is a thing in the real world with an independent existence. An entity may be an object with physical existence. For example particular person, car or it may be an object with a conceptual existence For example company, job, etc.

Attributes:

Each entity has attributes – the particular properties that describe it.

Relationship:

It is used to describe the relation between two entities.

Explanation:

E-R Diagram is design level task and Relational model is implementation.

The relational model is implemented from E-R Diagram and in this, it gets rid of the multivalued attributes.

Relations produced from the E - R Model will always be in 1NF, that is, Simple atomic values with non-multivalued attributes.

NOTES: