Questions

Q:

When a piece of pure silicon is doped with aluminium, then

A) the conductivity of the doped silicon piece will remain the same B) the doped silicon piece will become n-type
C) the doped silicon piece will become p-type D) the resistivity of the doped silicon piece will increase
 
Answer & Explanation Answer: C) the doped silicon piece will become p-type

Explanation:

p type of semiconductor is obtained when Silicon is doped with a trivalent impurity like Aluminium. Aluminium is a p-type dopant, which means that when a semiconductor i.e. silicon is doped with aluminium, it creates a hole (positively charged carrier) by accepting an electron from the silicon atom. Electrical conductivity of semiconductors increasesand resistivity remains the same

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Q:

A test to determine processor speed is?

A) a gesture B) flat panel
C) a benchmark D) None of the above
 
Answer & Explanation Answer: C) a benchmark

Explanation:

The total number of instructions a computer executes per second is called as its processors speed. 

 

Maximum the processor's speed minimum the time for execution.

 

A test to determine processor speed is a benchmark.

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Q:

Dry ice is an example of which process

A) Condensation B) Evaporation
C) Sublimation D) Freezing
 
Answer & Explanation Answer: C) Sublimation

Explanation:

Sublimation is a process when a solid changes directly into gas instead changing into liquid first. Dry ice is an example of Sublimation process because it doesn't change into liquid CO2 and directly change into gaseous CO2 when heated.

 

Hence, Dry ice is an example of Sublimation process. 

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Q:

"Go Back to Vedas" Who gave this motto?

A) Swami Dayananda Saraswati B) Ramkrishna Paramahamsa
C) Swami Vivekananda D) None of the above
 
Answer & Explanation Answer: A) Swami Dayananda Saraswati

Explanation:

The founder of Arya Samaj, Swami Dayananda Saraswati gave the motto "Go Back to Vedas" to propagate the true knowledge of Vedas.

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Q:

At the center of the sun, fusion converts hydrogen into

A) Helium B) Plutonium
C) Water D) Carbon
 
Answer & Explanation Answer: A) Helium

Explanation:

At the center of the sun, nuclear fusion converts hydrogen into helium, energy, and neutrinos. Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons).

At_the_center_of_the_sun,_fusion_converts_hydrogen_into1558676073.jpg image

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Q:

What tastes better than it smells?

Answer

Tongue. Yes tongue tastes better than it smells as it can't smell.

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Q:

Latitude of place is indicative of its

A) Temperature B) Altitude
C) Time D) Rainfall
 
Answer & Explanation Answer: A) Temperature

Explanation:

Latitude of place is indicative of its temperature. In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface. Latitude is an angle which ranges from 0° at the Equator to 90° at the poles.

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Q:

Is Osmosis Active or Passive?

Answer

Osmosis is the process in which water molecules move from a region of higher water potential to a region of lower potential down a water potential gradient across a partially permeable membrane. It doen't requires any additional energy to do this work. 


So, Osmosis is a Passive.


 


Active and passive transport processes are two ways molecules and other materials move in and out of cells and cross intracellular membranes.


1. Active transport is the movement of molecules or ions against a concentration gradient (from an area of lower to higher concentration), which does not ordinarily occur, so enzymes and energy are required.


2. Passive transport is the movement of molecules or ions from an area of higher to lower concentration. Passive transport occurs because of the entropy of the system, so additional energy isn't required for it to occur.



3. Active transport requires energy to proceed, while passive transport does not require the input of extra energy to occur.

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