# 3.1 Play with battery energy

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TECHNOLOGY

## [lo 1.3]

Making an electrical circuit using a wet cell battery.

Equipment:

• A lemon to serve as an electrolyte.
• Small strips of copper and zinc / or a brass drawing pin and a steel paper clip that can serve as electrodes.
• Two lengths of copper wire for conductors.
• A light bulb and bulb stand to provide the light.
• Two paper clips for connecting the metal plates and the conductors.

Method:

• Cut the lemon in half and use one half.
• Attach the strip of copper / brass drawing pin to one side of the lemon and the zinc strip / paper clip to the other side.
• Connect a paper clip to each of the wires and slide the paper clips on to the plates.
• Attach the other ends of the wires to the light bulb.

Observation:

Does the light bulb glow?

Connect an ordinary battery (a dry cell) and experiment with the circuit until the light bulb lights up with this battery.

Draw a circuit diagram of the electrical circuit to illustrate the flow of the current when the light bulb glows.

How could you increase the chemical energy to improve the brightness of the light from the light bulb?

## [lo 1.3]

Experiment with each of the following suggestions and mark the suggestion that provides the best result:

## Cells can be connected in two different ways for making a battery.

• Cells are in series when a positive pole of one cell is linked to the negative pole of another cell. With increasing the number of cells connected in series, the current that is supplied becomes more powerful. This means that the light bulb will glow more brightly.
• Cells are linked in parallel when all the positive poles of the cells are connected with one another to create a positive connection with the battery.
• The negative poles are also connected like this. When the number of cells that are connected in PARALLEL increases, the cells can produce the same current for longer.

## [lo 1.3, 1.6]

Create different switches for an electrical circuit. See how may different types of switches used in electrical appliances you can identify.

1. What is a switch?

It is a device for opening or closing a circuit so that electricity can flow along the circuit or be prevented from flowing.

1. Make each of the following switches and connect each to a battery and a light bulb to see if they work. Strip the isolation (plastic) from the ends of the wires before attaching them to the paper clips and use an elastic band to hold them in position against the paper clip.

If you want to use two or more batteries alongside one another, you could place them inside a cardboard or plastic tube.

A sliding switch

A push-button switch

A click switch

A dimmer switch

What happens when you slide one paper clip towards the other? Design your own switch. Add labels and colour to explain what the components are.

• Make a prototype of your switch and connect it to a circuit. Is your design successful?
• What type of switch did you make?

Assessment

Learning Outcomes(LOs)

LO 1

TECHNOLOGICAL PROCESSES AND SKILLS

The learner will be able to apply technological processes and skills ethically and responsibly using appropriate information and communication technologies

Assessment Standards(ASs)

We know this when the learner:

1.3 performs, where appropriate, scientific investigations about concepts relevant to a problem, need or opportunity using science process skills;

 1.6 chooses one of these solutions, giving valid reasons for the choice, and further develops the choice with graphics and/or modelling;

where we get a research paper on Nano chemistry....?
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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