Solar Energy

Q.

Which of the following sources of energy is not obtained from ocean?

1. Sea-water energy

2. Tidal energy

3. ocean thermal energy

4. Wind energy

Q.

Define Water Energy And Give Some Examples Of It

Q. Temperature of Earth's atmosphere is maintained by the heat received from Sun.

1. False
2. True

Q.

The process by which producers convert sunlight to a usable form of energy is called __________.

Q. Concave mirrors are used to solar energy.

1. focus
2. diverge
3. block

Q. Plants convert _______ energy to food.

1. chemical
2. sound
3. mechanical
4. solar

Q.

Name the devices that utilize solar energy.

Q. Which of the following do we need for solar energy?

1. Moon
2. Sea
3. Sun
4. Ocean

Q.

List two reasons which limit the usage of solar cells for harnessing energy for domestic use.

Q. Specify the sign conventions required for all types of mirrors

Q. Which part of the Earth gets the maximum heat from the Sun?

1. North Pole
2. South Pole
3. Equator
4. Can't say

Q. Which part of the Earth gets the maximum heat from the Sun?

1. North Pole
2. South Pole
3. Equator
4. Can't say

Q. A surface of area $1m^2$ kept perpendicular to the sun rays absorbs $1.8MJ$ of solar energy in one hour.
(a) What is the amount of electrical energy produced when a solar panel of area $5m^2$ is exposed perpendicular to the sun rays for $5h$. Take the efficiency of solar panel as 30%.
(b) Calculate the power generated in $kW$.

1. $13.5MJ;0.75kW$
2. $1.5MJ;0.75kW$
3. $13.5MJ;1.75kW$
4. $1.5MJ;1.75kW$

Q. The value of solar constant in SI system is

1. $1340\frac{watt}{m^2}$
2. $1340\frac{m^2}{watt}$
3. $1340\frac{kilowatt}{m^2}$
4. $1340\frac{watt}{m}$

Q.

In a dark night, how does a torch enables us to see objects?

1. Light from our eyes illuminates the object after being reflected by the torch.

2. A torch directs the light emitting from the object to our eyes.

3. Our eyes reflects the light emitting from the torch towards the object.

4. Light emitting from the torch falls on our eyes after being reflected by the object.