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Q:

Materials that usually are good conductors of electricity?

A) Aluminium B) Lead
C) Nickel D) Wood
 
Answer & Explanation Answer: A) Aluminium

Explanation:

Materials that usually allow electricity to pass through them are called Good conductors of electricity.


Conductors conduct electrical current very easily because of their free electrons.

Examples are :: Aluminium, Gold, Copper, Silver

 

Materials that do not allow or oppose electrical current & make poor conductors are called Insulators.

Examples are :: Glass, Plastic, Wood, Air,...

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Filed Under: Physics
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Q:

INI extension refers usually to what kind of file?

A) System file B) Image Color Matching Profile file
C) Hypertext related file D) Image file
 
Answer & Explanation Answer: A) System file

Explanation:

".INI" is an extention for all the configuration files in the system. 

 

Hence, .ini is an extension for System files.

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Filed Under: Computer
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Q:

An enumerated power the president has is

A) Nominate officials B) Appoint judges
C) Nominating high offocials D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Enumerate specific powers granted to the president, which include the authority to appoint judges, ambassadors, and other high-ranking government officials.

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Filed Under: Indian Politics
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Q:

For Gamma radiation, what stops its penetrating abilities?

A) Lead B) Steal
C) Concrete D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The highly energetic gamma particles can penetrate most compounds that stop by other types of radiation. However, lead, steel, or concrete can reduce the high energy of these particles, making them less penetrating.

 

Hence, Gamma radiation can be stopped by a several inches of lead or steel, or several meters of concrete.

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Q:

Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, what will be the sum of the highest number and the lowest number?

A) 120 B) 160
C) 80 D) 60
 
Answer & Explanation Answer: A) 120

Explanation:

Let the three numbers be x, y, z.

From the gien data,

x = 2y ....(1)

x = z/2 => z = 2(2y) = 4y .....(From 1)  ...........(2)

Given average of three numbers = 56

Then,

 

x + y + z3 = 562y + y + 4y3 = 56  (From 1 & 2)7y = 56 x 3y = 24

Now,

x = 2y => x = 2 x 24 = 48

z = 4y = 4 x 24 = 96

 

Now, the highest number is z = 96 & smallest number is y = 24

 

Hence, required sum of highest number and smallest number

= z + y

= 96 + 24

= 120.

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Filed Under: Average
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Q:

caffeine is also a what?

A) Psychoactive B) Barbiturate
C) Narcotic D) Opioid
 
Answer & Explanation Answer: A) Psychoactive

Explanation:

Caffeine is also a psychoactive drug which alters the mood and conscious in our behaviour. It is widely consumed as a psychoactive drug.

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Filed Under: General Science
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Q:

Exercise improves memory and learning.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

Exercise can boost your memory and thinking skills by improvising alertness, attention and motivation.

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Subject: General Science
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Q:

21% of 500 + 31% of 1100 - 30% of 790 = ? 

A) 209 B) 290
C) 309 D) 390
 
Answer & Explanation Answer: A) 209

Explanation:

Given 21% of 500 + 31% of 1100 - 30% of 790 = ?

 

? = 21 x 5 + 31 x 11 - 3 x 79

? = 105 + 341 - 237

? = 446 - 237

? = 209.

 

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Filed Under: Percentage
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