Question Discussion & Solution

CONCEPT:

• Frequency (f): The number of waves that pass a given point per second is called frequency.
  • The unit of frequency is vibration per second or Hertz.

• Time period (T): The time taken to complete one full oscillation or cycle by the Wave is called the time period.

  • The SI unit of the time period is second (s).

EXPLANATION:

• From the above table, it is clear that time is the physics quantity that has the same unit in both C.G.S and the M.K.S system.

The correct answer is In 1829.

• In order to prevent the practice of Sati, in 1829 it was first banned under the "Bengal Sati Regulation".

Key Points

• The Bengal Sati Regulation
  • ​The Bengal Sati Regulation was passed on December 4, 1829, here is all you should definitely know about the practice of Sati.
  • The Bengal Sati Regulation which banned the Sati practice in all jurisdictions of British India was passed on December 4, 1829, by the then Governor-General Lord William Bentinck.

Additional Information

• About Sati practice
  • Sati was a historical Hindu practice, in which a widow sacrifices herself by sitting atop her deceased husband's funeral pyre.
  • The extent to which sati was practised in history is not known with clarity.
  • However, during the early modern Mughal period, it was notably associated with the elite Hindu Rajput clan.

Concept:-

 Single linked list:

This list consists of a number of nodes in which each node has a next pointer to the following element. The link of the last node in the list is NULL, which indicates the end of the list.

Calculation:-

After perform ((Start → Next) → Next) the current link transfer to the third node of linked. And Third node data value is 128.

Hence the correct answer is 128.

The correct answer is the Helium nucleus.

• Helium nucleus was the source of alpha particles in the Rutherford scattering experiment.
• Ernest Rutherford, a British scientist conducted an experiment and proposed the atomic structure of elements.

Key Points

• Rutherford conducted an experiment by bombarding a thin sheet of gold with α-particles.
• He then analysed the trajectory of these particles after their interaction with the gold foil.
• Since very few α-particles were deflected back, and only a few α-particles had nearly 180^o angle of deflection.
• Hence he concluded that the volume occupied by the positively charged particles in an atom is very small as compared to the total volume of an atom.

The correct answer is Khejri.

Key Points
Khejri:

• It is known as Kalp Vriksha of desert.
• Prosopis cineraria is the scientific name.
• It was declared a state tree in the year 1983.
• It has a nitrogen-fixing tree which enhances the fertility of the soil.
• In 1988, the Indian Postal Department issued a Postal Stamp of paisa 60 on Khejri. 
• Khejri trees are found in the tropical thorny forest.