Please select a subject first
Advertisements
Advertisements
What is biodiversity?
Concept: undefined >> undefined
How can we protect the environment?
Concept: undefined >> undefined
Advertisements
Answer the following questions from figure:
- With reference to point B, potential energy of how much water reservoir in the dam will be converted into kinetic energy?
- What will be the effect on electricity generation, if the channel taking water to turbine starts at point A?
- What will be the effect on electricity generation, if the channel taking water to turbine starts at point C?
Concept: undefined >> undefined
Observe the given picture and answer the questions.
Questions:
- Identify the given diagram.
- What is the source of energy in this project?
- Why this source is supposed to be ecofriendly?
Concept: undefined >> undefined
Which of the following is used in solar cooker to harvest the solar energy?
a) Solar panels
b) Silicon cell
c) Mirrors
d) Glass lid
Concept: undefined >> undefined
Observe the connections of cells shown in the following images.
i. Which connection will give maximum potential difference?
ii. Give one advantage and one disadvantage of this energy.
Concept: undefined >> undefined
Explain in brief the sensitive issues of general public about disaster?
Concept: undefined >> undefined
Draw neat and labelled diagram.
One solar panel produces a potential difference of 18 V and current of 3 A. Describe how you can obtain a potential difference of 72 Volts and current of 9 A with a solar array using solar panels. You can use sign of a battery for a solar panel.
Concept: undefined >> undefined
Write a short note on electrical energy generation and environment.
Concept: undefined >> undefined
Write notes.
Disaster management Authority
Concept: undefined >> undefined
On the basis of the structure of disaster management authority, form the same for your school.
Concept: undefined >> undefined
Re-write the statement by selecting the appropriate option.
The solar lamp uses the ................... energy.
Concept: undefined >> undefined
Make a table based on forms of energy and corresponding devices:
| Forms of Energy | Devices | |
| a. | Electric | _________ |
| b. | Mechanical | Sewing machine, Bicycle |
| c. | Thermal | __________ |
| d. | _________ | Solar cooker, Solar heater |
Concept: undefined >> undefined
Solar photovoltaic cells convert the solar radiation energy directly into ______ energy.
Concept: undefined >> undefined
A silicon solar cell of dimension 1 sq.cm. generates a current of about ___________.
Concept: undefined >> undefined
A silicon solar cell of dimension 1 sq.cm. generates __________ potential difference.
Concept: undefined >> undefined
Power available from solar cells : DC : : power require to run domestic equipments : _________
Concept: undefined >> undefined
The power produced from solar cells is a DC.
Concept: undefined >> undefined
The potential difference available from a solar cell depends on its area.
Concept: undefined >> undefined
