Question Discussion & Solution

The pattern followed here is:

This is an alternate series of subtraction. The first number is subtracted by 2 to get the second number and then 4 is subtracted from the second number to get the third number and so on.

Hence, 42 is the correct answer.

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 New Incognito Window.

Key Points

• Incognito Window
  • ​Private browsing is a privacy feature in some web browsers.
  • When operating in such a mode, the browser creates a temporary session that is isolated from the browser's main session and user data.
  • Browse in private
    • Switch on computer > open the Chrome app.
    • To the right of the address bar, tap More> New Incognito tab.
    • A new window appears.
    • In the top left, check for the Incognito icon.

Additional Information

• New tab and New window
  • The big difference is that browser tabs are easier for users to manage than browser windows.
  • When a new window opens, it covers the user's earlier window.
  • But when a new tab opens, the user can still see their earlier tab at the top.
• New Window
  • ​Open File Explorer (Win+X)> Right-click or press and hold on one or more selected folder libraries, or drives in File Explorer> click/tap on Open in a new window.
• New Tab ​
  • New Tab is a button on the tab bar which easily creates a new file. 
• ​Bookmark
  • ​A bookmark is a saved shortcut that directs your browser to a specific webpage.
  • It stores the title, URL, and favicon of the corresponding page.

In a certain code language, 'BENJAMIN' is written as 'NIMAJNEB'. First letter of the word moves last and second letter of the word moves second last place and so on.

Similarly, 'POVERTY' written in that code language as 

POVERTY is written as YTREVOP.

Hence, "YTREVOP" is the correct answer.

• Power: The rate of work done by the electric energy is called power. It is denoted by P.
  • The SI unit of power is the watt (W).
  • Watt is a small unit that's why kilowatt-hour is used as the unit for electrical energy.
• 1 unit of electric energy: When one-kilowatt load works for 1 hour then the energy consumed is called 1 unit of electricity.

1 Unit of electricity = 1 kWh = 1000 Watt-hour = 3.6 × 106 J

1 Kilo-watt = 1000 Watt

• 1 Watt: The energy consumption rate of 1 joule per second is called 1 watt.

EXPLANATION:

Since 1 hr = 3600 sec

1 kWh = 1000 W-hr = 1000 × 3600 watt sec = 3.6 × 10⁶ J 

​So option 1 is correct.