Dielectric Constant

DIELECTRIC CONSTANT SK042

Exp-1 To determine the capacitance of plate capacitor by charge measurement.
Exp-2 To measure the capacitance as a function of area of plates.
Exp-3 To measure the capacitance as a function of distance between the plates.
Exp-4 To determine the dielectric constant of different dielectric materials .

Charge measurement by electrometer amplifier.
All electrical connections are made using safety sockets.
Capacitors plates are attached to insulated riders.
Electrical safety tested.

Capacitance.
Dielectric Constant.
Electric field.
Permittivity.

Principle and Working:
The relation between capacitance C, charge Q and charging voltage E is given as C=Q/E. The capacitance of a parallel plate capacitor depends upon the distance d between the plates, area A of the plates and the nonconductive material (having dielectric constant er) between the plates. Thus capacitance is
C = ε_r ε₀ A/d
Where ε₀ = 8.85 x 10^-12 As/Vm (permittivity in free space),
In present setup, the parallel plate are charged by 600 V DC power supply. The charge Q on the parallel plate is measured by electrometer amplifier as voltage. The distance between plate is adjusted by placing spacer on the edges of plate.

Contents:

Cat. No.	Item Name	Qty.
SEB03	Dielectric constant kit	1
SD003	Electrometer amplifier	1
SE067	Digital multimeter	1
SE080	Power supply ( 2-12 V AC/DC)	1
SEB02	High voltage power supply (0-600V DC)	1
SN200	Flexible plug leads (50 cm), black	4
SN203	Flexible plug leads (50 cm), red	4
SN207	Flexible plug leads (100 cm), yellow	3
R4589	Earthing lead (100 cm), green	1
C4341	Way switch	1
C4108	Capacitor module 0.01mF	1
C4179	Capacitor module 100nF	1
C4178	4.7 MΩ Resistance box	1

Power Supply 12V AC/DC SE080
- SPECIFICATIONS Output : 2,3,4,5,6,8,10 & 12VAC full wave rectified, unsmoothed & unregulated D.C.
  Overload : Resettable thermal trip.
  Input : 230 V AC,50 Hz
High Voltage Power Supply SEB02
- SPECIFICATIONS Input Voltage : 220V, ±5%, 50Hz AC
  Output Voltage : 0-600V DC
  Voltage Resolution : 10V
  Voltage Display : Analog
  Short Circuit Current : 100µ Amp
Electrometer Amplifier SD003
- SPECIFICATIONS Input Impedance : >1013 Ω
  Input Current : < 0.5pA
  Output Voltage : upto +10V
  Output Current : 5mA (Short Circuit Protected)
  Output impedance : < 1Ω
  Supply Voltage : 12 V AC
Digital Multimeter SE067
- SPECIFICATIONS Resistance : 200Ω, 2000Ω, 20k, 200k & 2000k Ω.
  D.C.Voltage : 200 & 2000 mV
  : 20, 200 & 600 V
  A.C.Voltage : 200 & 600 V
  D.C.Current : 200 & 2000 mA
  : 20 & 200 mA
  : 10 A
  Testing : Diode & transistor
Dielectric Constant Kit SEB03
- SPECIFICATIONS A Metal Rail : Metal sheet, L=350mm approx.
  B Capacitor plate : Aluminium, 20cm x 20cm (LxW)
  C Capacitor plate : Aluminium, 28cm x 28cm (LxW)
  D Glass sheet : 21cm x 21cm (LxW)
  E Polystyrene sheet : 21cm x 21cm (LxW)
  F Two way switch : 4mm socket, 3 nos.
  G Capacitor : 0.01µF & 0.001µF
  H Spacer : PVC (1,2,3,4,6 mm)
  
  Scope of Supply : Complete with metal rail with scale printed 0-10 cm, pair of large and small capacitor plates, PVC spacers, two way switch , glass and polystyrene sheets, earthing rod, capacitor module.

DIELECTRIC CONSTANT SK042

Electricity & Magnetism Experiments

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