ENGINEERING THE SIMPLEST GRAVITY CONTROL CELL BY
Fran De Aquino Physics Department, Maranhao State University- UEMA, Brazil deaquino@uema.br
2009
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ENGINEERING THE SIMPLEST GRAVITY CONTROL CELL
(1) Aluminum foil (7.5m X 0.45m; 10.5 microns thickness)
(2) Chemical characteristics
Al 98.02%; Fe 0.80%; Si 0.70%; Mn 0.10%; Cu 0.10%; Zn 0.10%; Ti 0.08%; Mg 0.05%; Cr 0.05%.
(3)
A 15cm square Aluminum foil of 10.5 microns thickness with the following characteristics: μr =1; σ = 3.82×107 S.m−1 ; ρ = 2700Kg.m−3
(4)
A 17 cm square Foam Board plate of 6mm thickness
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(4)
Foam Board
(5)
The 15cm square Aluminum foil of 10.5 microns thickness fixed on the 17 cm square Foam Board
(6) Ends of the connections
(7) The Simplest GCC (finished)
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Flexible Copper Wire # 12 AWG 15 cm square Aluminum foil (10.5 microns thickness)
Gum (Loctite Super Bonder) 17 cm square Foam Board plate (6mm thickness)
Aluminum foil
Foam Board
Fig. A – Details of the Simplest Gravity Control Cell (GCC).
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Dynamometer
50 mm
Sample Aluminum foil
Foam Board
GCC
Flexible Copper wire # 12 AWG
Pan balance
Battery 12V
r2* < 0 .1Ω
Rr Rheostat
ε2 0.60 Ω -100W
0.36 Ω - 60W Oscilloscope
Function Generation
HP3325A ε1
350Ω - 1W
Fig. B – Experimental Set-up.
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ε1
R1*
r1*
~ f = 20 μHz
I1
I2
ε2
r2*
RL
R 2*
+ −
I3
r p*
R *p
ε 1 = 7.5 V (rms ) Function Generator HP3325A r1* = 50Ω R1* = 350 Ω − 1 W
ε 2 = 12V DC
r2* < 0.1Ω (Battery ) R 2* = 0.60Ω − 100W r p* = 2.5 × 10 −3 Ω R *p = 0.36Ω − 60W I 1max = 30 mA (rms ) I 2max = 12.5 A
I 3max ≅ 12.5 A (rms )
Fig. C – Equivalent Electric Circuit