Higher Physics Lab Electricity & Magnetism



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 = εr 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.


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

Electricity & Magnetism Experiments