Electromagnetic Induction

Bab V. Electromagnetic Induction
ELECTROMOTIVE FORCE
I. Objective:
To comprehend electromotif force of two bobbin.
II. Equipment and Materials:

a. two bobbin
b. a galvanometer, a iron core
c. a battery of 9 V
d. a switch
e. link cable sufficiently

III. Basic theory:
Faraday and henry both discovered that electrick current could be produce in a wire simply by moving magnet into or out of a coil wire. No battery or other voltage source was needed-only the motion of a magnetic in acoil or a wire loop. They discovered that voltage is caused, or induced, by the relative motion between a wire and a magnetic field. Whether the magnitude field moves near a stasionary conductor or a vice versa, voltage is induce either way.
The greater number of loops of wire moving in a magnetic field, the greater the induced voltage. Pushing a magnet into a coil with twice as many loops induce twice as much voltage; Pushing into a coil with ten times as many loops induce ten times as much voltage; and so on. ( Hewitt, Paul G.;2007 : 136)
IV. Procedures
1. Compile appliance like at picture. Ascertain so that bobbin side remain to look out.

2. Broken joint switch continually. What is going on at galvanometer needle?
3. Enter iron core into bobbin. Repeat step of 2.
4. Write all the data of activity result in the following table.


V. Observation Table
Observasion Condition
Before inclution of iron coce After inclution of iron core







VI. Question
1. What is going on at galvanometer needle?
2. What is the inclusion of iron core?
3. What is your conclution?


Bab VI. Solar System
SUN ECLIPSE
I. Objective:
To demonstrate sun eclipse
II. Equipment and Materials:
a. Flash light
b. 2 plastic ball (small and big)
III. Basic theory:
Sun eclipse happened if earth, month, and the sun stay at one straight line. Total sun eclipse if month;moon on course closest with earth compared with shadow trapeze length month;moon. Bulan seen large compared by the sun and close over saucer glow the sun from opinion.
The total only taking place few minutes and can only be observed at certain places at shadows trajectories lines month of whoes narrows which falls of surface of earths. The total duration is at longest 7,5 minute, and same place will be recuring average of 360 year again. ( Slamet; 2010 : 75-76).
IV. Procedures
1. Place globule to desk and kill all lamps in rooms.
2. Point flash light ray to globule.
3. Move large ball cut globule.
4. Write all the data of activity result in the following table.
V. Observation Table
Position Of
Total Eclipse Eclipse Some Not Happened Eclipse




VI. Question
1. How form of hit by large ball is light during moving behind globule?
2. Where position of large ball to happened total eclipse, eclipse some and not happened eclipse?





Refference
Abdullah, mikrajuddin. 2004. IPA FISIKA 3. Jakarta: Erlangga
Abisabrina.wordpress.com/2010/08/13/hukum-ohm-dan-rangkaian-seri-paralel/
Hewitt, Paul G., dkk. 2007. Conceptual Integrated Sccience. San Fransisco: United States
Kanginan, Marthen. 2004. Sains Fisika SMP semester 1. Jakarta: Erlangga
Panitia Sertifikasi Guru. 2010. Ilmu Pengetahuan Alam SMP (Buku 2). Yogyakarta: UNY