Sources of Energy Test

Result

Sources of Energy Test - 38

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Weekly Quiz Competition

Question 1
1 / -0

Solar cooker consist of a box which is painted black from inside for the following reason -

A
To absorb more heat

B
To reflect light

C
To look beautiful

D
None of the above

Solution

The box of the solar cooker is painted black from the inside as a black surface absorbs more heat as compared to a white or a reflecting surface under identical conditions.
Question 2
1 / -0

State true or false.
A good source of energy would be one which would do a little amount of work per unit volume or mass.

A
True

B
False

C
Ambiguous

D
Data Insufficient
Solution
The given statement is false.
A good source of energy would be one
- which would do a large amount of work per unit volume or mass
- be easily accessible
- be easy to store and transport
- be economical
Question 3
1 / -0

It is estimated that during a year India receives the energy equivalent to more than _____________.

A
2,000 trillion kWh

B
3,000 trillion kWh

C
4,000 trillion kWh

D
5,000 trillion kWh

Solution

It is estimated that during a year India receives the energy equivalent to more than 5,000 trillion kWh.
Question 4
1 / -0

The setup shown in the figure is called ____________.

A
Solar Cell

B
Electric Cell

C
Solar Cooker

D
Solar Panel
Solution
A solar cooker is a device used to cook food from sunlight.
Solar cooker consists of wooden box, mirror and glass sheet.
- Wooden box is painted black from the inside to absorb more heat.
- Mirror is used to allow the reflected sunlight to fall on the glass sheet of the box.
- The glass sheet does not allow the heat to escape and thus, helps in raising the temperature in the box to a sufficiently high degree to cook the food.
Question 5
1 / -0

Identify from below the energy source that use solar energy.

A

B

C

D
Solution
The correct ans is option C.

Options given are
- A - Combustion of Natural gas
- B - Windmill
- C - Solar panels
- D - Burning wood
Question 6
1 / -0

The Sun has been radiating an enormous amount of energy at the present rate for nearly _____________ years.

A
$$5 \ million$$

B
$$4 \ million$$

C
$$5 \ billion$$

D
$$4 \ trillion$$

Solution

The Sun has been radiating an enormous amount of energy at the present rate for nearly $$5 \ billion$$ years and will continue radiating at that rate for about $$5 \ billion$$ years more.
Question 7
1 / -0

A black surface absorbs more heat as compared to a white or a reflecting surface under identical conditions. Which among the following uses this property?

A
Solar Cooker

B
Solar Heater

C
Both of them

D
None of them

Solution

Solar cookers and solar water heaters use the property of black surface and reflecting surface for its working.
Question 8
1 / -0

A ______ surface absorbs more heat as compared to a ______ or a reflecting surface under identical conditions.

A
white, white

B
black, white

C
white, black

D
black, black

Solution

A black surface absorbs more heat as compared to a white or a reflecting surface under identical conditions. Solar cookers and solar water heaters use this property in their working.
Question 9
1 / -0

Which among them work using solar energy?

A
Solar Cell

B
Solar Heater

C
Solar Cooker

D
All of the above
Question 10
1 / -0

_________ left behind in a bio-gas plant is used as an excellent manure.

A
Slurry

B
Methane

C
Soil

D
Hydrogen

Solution

Slurry left behind is removed periodically and used as excellent manure.