Dana.A.Al Freeh: Name Qualification: Master physics Solids state: Department بسم الله...
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Dana .A.Al Freeh: NameQualification: Master physicsSolids state: Department
بسم الله الرحمن الرحيم
OHM’S LAW-1
Name of experiment
objective
To study Ohm’s law applied to a “linear DC circuit.
OHM’S LAW
Theory
Ameter(I):The device to measure
I(curent)
Voltmeter(V): The device tomeasure voltage(v) volmeter
V=I R
(R)is resistance Ὼ
Data
R=V/I I(A) V(v)
1
2
3
4
7
6
8
Graphing
I(A)
V(volt)
Slope(V1,)2V)
Slope=
Dana .A.Al Freeh: NameQualification: Master physicsRoom NO: 209\14DSolids state: Department
بسم الله الرحمن الرحيم
OHM’S LAW(1)
Name of experiment
objective
To study Ohm’s law for parallel and series circuit.
objective
Theory
Series:series
Theory
PARALLEL
series
Data Table
R=V/I I(A) V(v)
series
R=V/I I(A) V(v)
Graphing
I(A)
V(volt)
Slope(V1,)2V)
Slope= 𝑹𝒔=𝑹𝟏+𝑹𝟐
R=V/I I(A) V(v)
(I1,)2I)
Graphing
I(A)
V(volt)
Slope(V1,)2V)
Slope=
R=V/I I(A) V(v)
𝑹𝑷=𝑹𝟏𝑹𝟐
𝑹𝟏+𝑹𝟐
In the end
OHM’S LAW(2)
Name of experiment
objective
To study Ohm’s law as applied to a “ linear “ DC circuit .To show the behavior of some “ non-linear “ circuit elements which do not obey Ohm’s law .
Theory
Ohm’s law
Theory
R is resistance at the final.
is resistance at the initial.
T is Temperature at final .
is Temperature at initial .
Data Table R=V/I Ω
I(A) V(v)
Data Table
Graphing
I(A)
V(volt)
Non -linear
conclusion
Evident from the graph non-linear relationship between voltage and current, and this is evidence that the part of the battery is consumed as energy and thermal part of the lighting.
In the end
Measurement of thickness of a very thin sample
Name of experiment
objective
Part (1) Part (1)
Objective ObjectiveTo estimate the number of atoms in the thickness of pencil line
n= t/2X10^-10
Calculate the resistivtyof
pencil=R A/L
objective
Meaning physicist Symbol
()Reisstance R( .m)Resistivity
Length (m) LThe area of cross-section( A
Thickness (m) tWide (m) WNumber of atoms nradius rdiameter d
Theory
8cm
R=8ᾩ
ᵨ ᵨᵨᵨᵨᵨ ᵨᵨ
ᵨ: ResistivityR: resistance
Theory
.
t = ᵨ L / WR
ᵨLR
W= 2mm (Diameter )
Diametern = t \ 2X10^-10
=R A/L
Theory
=R
R=
t =
In the end
Dana .A.Al Freeh: NameQualification: Master physicsDepartment: Solids stat209-14D: ROOM No
بسم الله الرحمن الرحيم
Name of experiment•Wheatstone bridge
objetive
1-To introduce bridge circuits null detection method to measure the resistance of a conductor.
2 -To measure the resistivity of several conductors.
3 -To determine the variation of the resistance of a conductor
with its length and crosssectional area.
Theory
8cm
R=8ᾩ
ᵨ ᵨᵨᵨᵨᵨ ᵨᵨ
Theory
𝑰𝟏
𝑰𝟐
=Theory
𝑅2 𝑅3
𝑹𝑿
POWER SUPPLY Keya b
𝑹𝟐=𝝆 𝒂𝑨
𝑹𝟑=𝝆 𝒃𝑨
Theory
𝑹𝒙=𝒃𝒂𝑹𝟏
X100%
(A=3.3X , L=0.1cm)
Dana .A.Al Freeh: NameQualification: Master physicsDepartment: Solids stat209-14D: ROOM No
بسم الله الرحمن الرحيم
Group (1)100 R1
a= 6650 Rtho
b =? Rx
? Error=
Group(2)
100 R1
a= 65.5
50 Rtho
b =? Rx
Home Work
Name of experiment•SLIDE-WIRE POTENTIOMETER
objetive
Part(2) Part(1)
To measure the (emf) of an unknow (εx) cell usuing the slide wire
potentiometer(emf=Electro magntic
field)
To establish the linear voltage(V)
/ displacement(L)
relation ship of the potentiometer
Theory
Part(2) Part(1)Ex=I Rx
Es= I Rs
Equal (I) Ex = Es Rx\ Rs
Rx=ῥ Lx\A ,Rs=ῥLs\AEx=Es Lx\Ls
V= I RR= ᵨ L \AV=I ᵨ L \A
Theory
Part(2) Part(1)
L
+ -Power supply
v
+ -Power supply
G
+ -
Lx or Ls
Theory
Part(1)
V L102030
100
Theory
Part(2) Part(1)
εs= 1.5vLs=Lx εs\εxεx
Lx
V(v)
L(cm)
`
Ex=Es Lx\Ls
In the end
Error•Error ε=[εs-εx]/εs X100
Name of experiment•Speed of sound in air
objetive
•To study sound wave resonances in air columns and to
measure the velocity of sound in air.
Theory
((Maximume sound
Theory
Theory
V= f λV=velocity(m/s)
f = The frequency(cycle)λ = wavelength(m)
Theory
•V= 4F [L +(0.3)d]•d= diameter of tube
TheoryV= 4F [L +(0.3)d] d(m) L(m) L(cm) F(CYCLE)
In the end