Tag: production of electricity from solar energy

Questions Related to production of electricity from solar energy

State whether true or false :
Solar dryer can be used in night also.

physics energy management solar power plant production of electricity from solar energy solar energy and its applications

  1. True

  2. False

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Correct Option: B
Explanation:

At night there is no sunlight to produce heat energy so we cannot use solar cookers in night.

State whether true or false :
The purpose of glass cover placed on solar dryer is to sustain the heat.

physics energy management solar power plant production of electricity from solar energy solar energy and its applications

  1. True

  2. False

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Correct Option: A

The purpose of black coloured box in a solar dryer is to :

physics energy management solar power plant production of electricity from solar energy solar energy and its applications

  1. Absorb more heat

  2. Absorb less heat

  3. Reflect light

  4. None of these

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Correct Option: A
Explanation:

We use the black coloured box to absorb more heat as black colour is the best absorber for heat among its all colours.

What is the main source of energy for Earth?

evs solar energy solar power plant production of electricity from solar energy solar energy and its applications

  1. Moon

  2. Plants

  3. Humans

  4. Sun

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Correct Option: D
Explanation:

Sun is the ultimate source of energy because all renewable and non renewable sources are ultimately derived form sun.

We get solar energy which can be put to many uses. 

A mercury drop of water has potential 'V' on its surface. $1000$ such drops combine to form a new drop. Find the potential on the surface of the new drop.

physics energy : forms and sources renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

  1. V

  2. $10$V

  3. $100$V

  4. $1000$V

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Correct Option: C
Explanation:

Potential of single smaller Hg drop of water =$\dfrac{Kq}{r}$=V-----(1)

and we know potential of n smaller Hg drop of water $=\dfrac{Knq}{R}$------(2)
Volume of 1000 small drops = volume of larger drop
$1000\dfrac{4}{3}\pi {r}^{3}=\dfrac{4}{3}\pi {R}^{3}$
Thus radius of bigger droplet $R=10r$
 Now putting the value of R in equation 2 we get
Potential of larger drop$=\dfrac{1000Kq}{10r}$=$100V$  

There will be an increase in potential energy of the system if work is done upon the system by

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

  1. any conservative or non-conservative forces

  2. a non-conservative force

  3. conservative force

  4. None of the these

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Correct Option: C
Explanation:

Since potential energy defined only for conservative force. It will increase for conservative force.

Potential energy of a body depends on its:

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

  1. motion

  2. colour

  3. mass

  4. none of these

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Correct Option: C
Explanation:

We know that potential energy is the energy possesd by the virtue of its position.
So, $F = mgh $
Where, $ m = $ mass
So, From above equation we can deduce that potential energy depends on the mass of the substance.

Energy possessed by a body by virtue of its position at a height is :

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

  1. Kinetic energy

  2. Chemical energy

  3. Potential energy

  4. Magnetic energy

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Correct Option: C
Explanation:

Potential energy of a body is defined as energy possessed by a body by  virtue of its position at a height.
$ P.E = mgh$

The principle behind the working of an atom bomb is:

chemistry energy : forms and sources renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

  1. Nuclear fussion

  2. Nuclear fission

  3. Radioactivity

  4. None of these

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Correct Option: B
Explanation:

Nuclear fission

 The atom bomb , also known as atomic bomb or fission bomb is an explosive device  that derives its destructive force from the fission of heavy elements. Typical fuel for the fission reaction within the bomb is either uranium or plutarium.

The energy released by the Hiroshima bomb was originally thought to be equivalent to the destructive power of approximately 

chemistry energy : forms and sources renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

  1. 2000 tons of TNT

  2. 20000 tons of TNT

  3. 200000 tons of TNT

  4. 2000000 tons of TNT

Show answer
Correct Option: B
Explanation:

Blast yard of little bys is equivalent to 15 kilotons(15000 tons)  of TNT.