# 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;

#### Questions & Answers

how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Technology grade 6. OpenStax CNX. Sep 08, 2009 Download for free at http://cnx.org/content/col11005/1.1
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