Question Discussion & Solution

Concept:

• Electric current is the rate of flow electric charge or free Electrons in a definite direction through any section of wire. Its SI unit is ampere(A).
• The direction of the conventional current corresponds to the direction of positive charge which is from higher potential(positive) to lower potential(negative).

I = Q / t

I is current, Q is charge, t is time

Explanation:

Q = I t

So Charge is the product of current and time.

Unit of current is Ampere, and unit of time is an hour. 

So, Amount of charge or Quantity of electricity is Ampere-hour 

The pattern is:

15

15 × 3 - 3 = 42;

42 × 4 - 4 = 164

164 × 5 - 5 = 815;

815 × 6 - 6 = 4884

The correct answer is Yamuna River System.

Key Points

• The Betwa is a tributary of the Yamuna River.
• It originates in the Vindhya Range in Madhya Pradesh and flows through Orchha (Madhya Pradesh) before reaching Uttar Pradesh.
• It joins the Yamuna River near Hamirpur after traveling 590 kilometers.
• The Betwa River has two major tributaries: the Halali and Dhasan Rivers.
• The Yamuna river is a major tributary of the river Ganges, it originates from the Yamunotri glacier near the Banderpoonch peaks of the lower Himalayas.
• It travels a total length of 1,376 kilometers and merges with the Ganges at Triveni Sangam, Prayagraj (Allahabad).
• Tons, Hindon, Ken, Betwa, Chambal rivers are some of its tributaries.

Additional Information

• Ganga River System:
  • The Ganga (the Padma in Bangladesh) forms by the confluence of Alakhnanda and Bhagirathi at Devprayag.
  • Bhagirathi originates from Gangotri glacier and Alakhnanda originates from Satopanth glacier.
  • The total length of the Ganga river is 2525 km.
  • Some of the tributaries of Ganga are the Yamuna, the Ramganga, the Gomati, the Ghaghara, the Gandak, the Kosi and the Mahanada.
• Narmada:
  • The Narmada is the largest west-flowing river in India.
  • It rises near the Amarkantak range of mountains in Madhya Pradesh.
  • It is the fifth-largest river in the country.
  • The total length of the river is 1312 kilometers.
  • The Sher, the Dudhi, the Tawa (biggest tributary), the Ganjal, the Hiran, the Barna, the Choral, and the Lohar are some of the tributaries of the Narmada river.
• Tapti:
  • Tapti River is one of the major rivers of peninsular India.
  • Its total length is 724 km.
  • The Tapti river source of origin lies in Multai, in the Betul district of Madhya Pradesh.
  • Vaki, Gomai, Arunavati, Aner, Panjhra, Bori, and Girna are some of the tributaries.

The pattern followed is

The correct answer is Option(2).i.e.Alpha Decay.     

• In radioactivity, the emission consists of the Helium nucleus sustains under Alpha Decay. 
• Alpha Decay: 
  • It is basically responsible for the emission of the Helium nucleus. 
  • An alpha particle is consists of two neutrons & two protons which is the same as a helium nucleus.
  • We generally use 24He to implement an alpha particle which has a 2+ charge.
  • The original atomic number of the atom decreases by two (because of the loss of two protons), and its mass number decreases by four (because of the loss of four nuclear particles) when a radioactive atom throws down an alpha particle. 
• Emission of Alpha Particle: 
  •  The emission of an alpha particle can be present with a chemical equation: 
  • For example, the alpha-particle emission of uranium-235 is as follows:
       ²³⁵U₉₂→⁴He₂ + ²³⁵Th₉₀