ID Number:

TEACHER NAME:

WORKSHEET

“ E L E C T R I C I T Y “ P I C K Y R O B O T ” I N J U N I O R H I G H S C H O O L”

INTRODUCTION

Electricity is a naturally occurring force that exists all around us. Humans have been aware of this force for many centuries.

It used to be that if you had a string of holiday lights and one bulb

went out, the whole string no longer worked. This was because

the lights were set up in a series circuit. Recently, companies

have started producing lights and other electronics that are set

up in parallel circuits. Circuits carry electric current when they

are in a closed loop, and can act differently depending on the

physical set up of the circuit. Current, which is the flow of

electrons in a circuit, can be carried through wires, barriers, and

any functional pieces of circuits, like lights.

Ohm’s law is an equation that describes the relationship

between voltage (electric force), current (electron flow) and

resistance (the resistance of an object to passing electric

current).

I = V / R

Where V is voltage, measured in volts (V), I is current, measured

in amperes (A), and R is electrical resistance, measured in ohms

(Ω)

In a series circuit, the parts of the circuit are in a row, one after

the other so current flows through them. Parallel circuits are set

up so that the current has an independent path to take through

each piece. For holiday lights, this means one bulb can burn out

and not affect the rest of the circuit.

EXPERIMENT:PICKY ROBOT

OBJECTIVE:

TOOLS AND MATERIALS:

Equipment Material

Lamp/ music box

Little box made of transparant material

Battery

Wire

Wrap

Box for battery

Hanger

Alumunium

Copper

Nail/iron

Zinc/steel

Glass

Paper

Wood

Student know how to make an electricity , the element needed to make it, which one is conductor and isolator.

Student know the parallel and series electricity set.

Student know the basic calculation of electricity

EXPERIMENT SAFETY:1. Don’t touch it if your hands are wet

2. Use shoes when arrange the circuit.

3. Handle every equipment carefully.

Hear the instruction of your teacher.

Make an electricity circuit by yourself. Pick up the needed equipment from the box to make an electricity.

1. Pick up the robot

What do you think the equipment needed to make an electricity?

Drawing of the electricity circuit

2. Robot will choose

What’s conductor on your opinion?

What happen when the circuit connected by the conductor material?

What’s isolator on your opinion?

What happen when the circuit connected by the isolator material?

List the material and place it in the table below.

Conductor Isolator

3. Robot finds friends

What do you know about parallel circuit?

Draw it

What do you know about series circuit?

Draw it

4. Exercise of Concept

(fill the blank)

Voltage = Current X Resistance

1,5 v = X 3 Ω

= 3 A X 4 Ω

120 v = 4 A X

240 v = X 12 Ω

Power = Voltage X Current

27 W = 9 V X

= 120 V X 1,5 A

45 W = X 3 A

= 120 V X 2 A