Questions

The principal quantum number is the property of an electron which determines the energy of electron and the distance of electron from the nucleus of an atom.

A Focus of an earthquake is the location where the earthquake begins. The ground ruptures at this spot, then seismic waves radiate outward in all directions.

At this focus point, the release of energy due to faulting actually occurs during an earthquake. The point directly above the focus on the surface is called Epicenter.

The focus is also called as Hypocenter as it is the synonym of the focus.

Sumitra Mahajan is the current speaker of Lok Sabha.

During any emergency of wars, some of the Fundamental Rights can be suspended that is what mentioned in constitution of India.

False. The given statement that starting or restarting a computer is called tasking the system is not correct. 

We know that the starting or restarting a computer is called Booting the system.

The Dubai Mall, located in downtown Dubai, UAE, consists of four levels with a floor area of 548,127  (5.9 million ) and has 1,200 retail outlets and over 160 food and beverage outlets. Construction began in 2004, with the mall opening its doors on 4 November 2008. 

The kilowatt hour (kW⋅h) is a composite unit of energy equivalent to one kilowatt (1 kW) of power sustained for one hour.

One watt is equal to 1 J/s. One kilowatt hour is 3.6 megajoules.