Percobaan Listrik Dinamis 2 | Assesment Satoe

Oktober 13, 2011

Percobaan Listrik Dinamis 2

Name:____________________________________ Date:  _____________________   Class:  _______________

Student Work Sheet

A.      Title of Experiment    :  Electric Current
Class / Semester         :  IX / 1 (Odd)

B.      Experiment Objectives
1.       To construct various types of battery circuits
2.       To measure the battery electromotive force
3.       To measure the potential difference in the circuit

C.     Apparatus and materials
1.       Batteries…………………………………………………..             3 pieces
2.       Light bulb ………………………………………………… 1 pieces
3.       Electric cables/wires ……………………………….. …. 2 meters
4.       Multimeter  ……………………………………………….             1 unit

D.     Experimental Procedures
1.       Connect 3 batteries in series circuit
2.       Connect the bulb to the circuits
3.       Measure the battery electromotive force with the multimeter
4.       Measure the bulb potential difference difference with the multimeter
5.       Record your measurement results in the table
6.       Calculate the bulb potential difference using the suitable formula
7.       Record your calculation result in the same table
8.       Repeat step 1 to 7 by changing the above circuit to parallel and mix circuits  

E.      Experimental table
NO
Circuit Type of
Batteries
Emf
(volt)
Potential
Differience
(volt)
Light Bulb
observed
Calculated
Very bright
Bright
Dimme
1
series






2
parallel






3
Mixed







Questions
1.       Which circuit type of batteries shows the greatest emf?
2.       Which circuit type of batteries shows the greatest potential difference?
3.       Which circuit type of batteries leads to brightest light ? Why?
4.       Compare the observed and calculated potential differences of the light bulb. Are they the same ? Why ?

F.      Conclusions
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….



Scoring Scheme

No
Scoring Aspects
Score
1
2
3
4
1



2


3
Preparation
a.       Apparatus and materials are complete.
b.       Apparatus and materials used by the student are correct for achieving the experimental objectives
c.       All apparatus and materials are arranged nearly

Performing experiment
a.       Circuit of batteries and light bulb.
b.       Measurement of the electromotive force
c.       Measurement of the potential difference.
d.       Working in group

Experimental results
a.       Collecting experimental data
b.       Answering the questions
c.       Drawing conclusions





Total Score
40




Rating Mark :
1.       If the student did nothing
2.       If the student did incorrectly
3.       If the student did correctly but not perfectly
4.       If the student did perfectly correc

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