Questions

Q:

Mirage is an example of

A) Reflection of light & Refraction of light B) Dispersion of light
C) Total Internal Reflection D) Refraction of light & Total Internal Reflection of light
 
Answer & Explanation Answer: D) Refraction of light & Total Internal Reflection of light

Explanation:

A Mirage is a naturally occurring optical phenomenon in which light rays bend to produce a displaced image of distant objects or the sky.




      • It is caused due to Total internal Reflection.

 

      • It is an optical illusion observed in deserts or hot summer days due to which a person sees a pond of water some distance ahead of him in which the surrounding objects appear inverted.

Mirage_is_an_example_of1556276063.jpg image


How Mirage Forms::

 

1. The temperature of other layers of atmosphere goes on decreasing as we go up.
2. Therefore density and refractive index of air changes as one goes up.
3. Thus a ray of light,gets refracted more and more away from the normal.
4. At a particular angle when a ray of light exceeds critical angle, total internal reflection takes place and ray of light gets reflected in the same medium.
5. when the reflected ray reaches our eye, it appears as coming from tree or sky .
6. Hence the inverted image of tree creates an impression from a pond of water.

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Q:

Select the antonym of

amenable

A) responsive B) pliable
C) docile D) unsusceptible
 
Answer & Explanation Answer: D) unsusceptible

Explanation:
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Q:

Find the potential energy gained by a body of mass 60 kg, if it is raised by 12 m. (use g = 10 m/s2)

 

A) 7200 B) 50
C) 3600 D) 25
 
Answer & Explanation Answer: A) 7200

Explanation:
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Q:

What will be output when you will execute following c code?

#include <stdio.h>
void main()

{
     switch(2)

      {
            case 1L:printf("No");
            case 2L:printf("%s","I");
              goto Love;
            case 3L:printf("Please");
            case 4L:Love:printf("Hi");
     }
}

A) I B) IPleaseHi
C) IHi D) Compilation error
 
Answer & Explanation Answer: C) IHi

Explanation:

It is possible to write label of goto statement in the case of switch case statement.

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Q:

void main()

{

char good *better, *best;

printf( "%d..%d", sizeof(better), sizeof(best) );

}

A) 1..2 B) 4..4
C) 4..2 D) 2..2
 
Answer & Explanation Answer: C) 4..2

Explanation:

The second pointer is of char type and not a good pointer.

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Q:

Improve the bracketed part of the sentence.

You and I must understand (one another), and that too without delay.

 

A) one other B) with one another
C) each another D) no improvement
 
Answer & Explanation Answer: D) no improvement

Explanation:
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Q:

What loses its head every morning and gets it back every night?

A) Pillow B) Candle
C) Moon D) Light
 
Answer & Explanation Answer: A) Pillow

Explanation:
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Q:

Which of these was an action of Farmers Alliances?

A) Involving farmers in political action B) Encouraging farmers to give up farming
C) Helping farmers fight for better prices D) Both A & C
 
Answer & Explanation Answer: D) Both A & C

Explanation:

The Farmers Alliance was an organized agrarian economic movement among American farmers that developed and flourished in 1875.

 

One of the goals of the organization was to end the adverse effects of the crop-lien system on farmers in the period following the American Civil War.

 

The Farmer's Alliance moved into politics in the early 1890s under the banner of the People's Party, commonly known as the "Populists."

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