Anil Ahlawat Solutions for Chapter: Sources of Energy, Exercise 1: EXERCISES

Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?

In nuclear power reactors,
$\left(\mathrm{i}\right)$ Uranium-$235$ is used as the fission material.
$\left(\mathrm{ii}\right)$ Graphite is used as a moderator.
$\left(\mathrm{iii}\right)$ Rods of cadmium are used to control the rate of nuclear reaction.
Which of the above statements are correct?
 

Energy released in the fission of $1 \mathrm{kg}$ of $U-235$ is equivalent to energy obtained from burning of coal weighing _____.

Match column $\mathrm{I}$ with column $\mathrm{II}$ and select the correct option from the codes given below.

Which of the following statements is not correct regarding the geothermal energy?

Main disadvantage of geothermal energy is :

Read the passage carefully and answer the following questions.

Ocean waves are derived sources of energy. Wind is the agent which transfer the Sun’s energy to the surface of the sea. The unequal solar heating of the Earth generates wind and wind blowing over water generates waves. The energy possessed by ocean and sea waves is called wave energy. Various systems have been designed to use wave energy for commercial production of electricity.
Which of the following statements is wrong regarding the wave energy?

Read the passage carefully and answer the following questions.

Ocean waves are derived sources of energy. Wind is the agent which transfer the Sun’s energy to the surface of the sea. The unequal solar heating of the Earth generates wind and wind blowing over water generates waves. The energy possessed by ocean and sea waves is called wave energy.
The main disadvantage of wave energy is :