Questions

Q:

A voltaic cell converts chemical energy to

A) Heat energy B) Electrical energy
C) Mechanical energy D) Light energy
 
Answer & Explanation Answer: B) Electrical energy

Explanation:

A galvanic cell is also known as voltaic cell provides electrical energy from the chemical energy.

 

a_voltaic_cell_converts_chemical_energy_to1558088421.png image

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Filed Under: Physics
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Q:

The ratio of gross cropped area to the net sown area is called

A) cropping intensity B) intensity of crop rotation
C) crop productivity D) cropping diversity
 
Answer & Explanation Answer: A) cropping intensity

Explanation:
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Q:

A starts a business, after 6 months B also join him with Rs.4500 and after 2 months of B’s joining C also join them with Rs.4500. If A gets approx. Rs 4900 out of total annual profit of Rs. 10,000 then find the approximate value of initial investment of A.

A) Rs.4800 B) Rs.4200
C) Rs.3600 D) Rs.4400
 
Answer & Explanation Answer: C) Rs.3600

Explanation:

Let initial investment of A = x
Ratio of profit A : B : C = 12 × x : 6×4500 :4×4500
A :B:C = x : 2250: 1500
Now ATQx/(x+2250+1500) = 4900/10000
solving this we get,x ≈ Rs 3600

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Q:

In a computer game, a builder can build a wall in ten hours while a destroyer can demolish such a wall completely in fourteen hours. Both, the builder and the destroyer were initially set to work together on level ground. But after 7 hours the destroyer was taken out. What was the total time (in hrs) taken to build the wall ?

A) 17 B) 15
C) 24 D) 35
 
Answer & Explanation Answer: B) 15

Explanation:
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Q:

Write a c program for selection sort.

Answer

include<stdio.h>
int main(){

  int s,i,j,temp,a[20];

  printf("Enter total elements: ");
  scanf("%d",&s);

  printf("Enter %d elements: ",s);
  for(i=0;i<s;i++)
      scanf("%d",&a[i]);

  for(i=0;i<s;i++){
      for(j=i+1;j<s;j++){
           if(a[i]>a[j]){
               temp=a[i];
              a[i]=a[j];
              a[j]=temp;
           }
      }
  }

  printf("After sorting is: ");
  for(i=0;i<s;i++)
      printf(" %d",a[i]);

  return 0;
}

Output:
Enter total elements: 5
Enter 5 elements: 4 5 0 21 7
The array after sorting is:  0 4 5 7 21

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Subject: Programming

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Q:

Plants are photosynthetic autotrophs.

What does this mean?

Answer

Plants are photosynthetic autotrophs, which means that they are able to produce their own food through the process called photosynthesis.


 


In photosynthesis, plants use light, water, and carbon dioxide to create glucose, which they convert to cellulose and use to make new cells.


 


Hence, that is why, Plants are called photosynthetic autotrophs.

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Q:

Name the lender that has signed an agreement with the Government e-Marketplace (GeM) under which the bank will facilitate a host of services to the public procurement portal for Central and state government organizations.

A) ICICI Bank B) HDFC Bank
C) Bank of Baroda D) SBI
 
Answer & Explanation Answer: B) HDFC Bank

Explanation:

Private Sector lender HDFC Bank signed an agreement with the Government e-Marketplace (GeM) under which the bank will facilitate a host of services to the public procurement portal for Central and state government organizations.

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Q:

Which of the following causes adiabatic temperature changes in atmosphere?

A) Deflection and advection B) Latent heat of condensation
C) Expansion and compression of the air D) Partial absorption of solar radiation by the atmosphere
 
Answer & Explanation Answer: C) Expansion and compression of the air

Explanation:

Application of temperature changes in the atmosphere is in adiabatics, or temperature change which are caused by compressing or allowing air to expand.

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