PERMEABILITY AND PERMITIVITY OF AIR
Item Code : SK201
Principle and Working:
The repulsive force between two current-carrying conductors, though very small, is measured using a highly sensitive balance technique based on a diode laser, scale, and fractional weights, forming an optical lever. This measurement is used to calculate the permeability of air.Similarly, a small attractive force between two charged capacitor plates is measured to determine the permittivity of air. Based on these experimental values of permeability and permittivity, an indirect estimate of the speed of light can be made, verifying the theoretical relationship.
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- DC Regulated power supply with safety sockets and dual temperature controlled exhaust fan.
- High voltage supply with safety socket and smart thermal safety switch
- Highly sensitive balance for permeability and permittivity experiment.
- Diode Laser with 0.8 mW power.
- To measure the force between current carrying conductor and determine the permeability of air.
- To measure the force of attraction between charged capacitor plates and determine the permittivity of air.
- Electrometer Amplifier : Input Impedance >1013 Ω, Input current < 0.5pA, Output Voltage up to +10V, Output Current 5mA (SC), Output impedance < 1 Ω, Supply voltage 12V AC
- Dielectric Constant Kit : Metal Rail L=350mm approx.,Capacitor plate Al 20 x 20cm (LxW), Capacitor plate Al 28 x 28cm (LxW), Glass sheet 21cm x 21cm (LxW), Polystyrene sheet 21cm x 21cm (LxW), Two way switch 4mm socket, Capacitor 0.01μF & 0.001μF, H Spacer PVC (1,2,3,4,6 mm)
- HV Power Supply : Input Voltage 220V, ± 5%, 50Hz AC, Output 0-600V DC, Voltage Resolution 10V, Voltage Display Analog. Short Circuit Current 100μ A.
| S.No. | Item Name | SK201 |
| 1 | Adaptor 5V/1A | 1 |
| 2 | Base unit | 1 |
| 3 | Capacitor plate lower | 1 |
| 4 | Capacitor plate upper | 1 |
| 5 | Cylindrical base | 2 |
| 6 | DC power supply 0-30V DC, 20A | 1 |
| 7 | Digital multimeter | 1 |
| 8 | Diode laser (red) | 1 |
| 9 | Flexible plug lead 100cm (black) | 2 |
| 10 | Flexible plug lead 100cm (red) | 2 |
| 11 | High current safety wire (black) | 1 |
| 12 | High current safety wire (red) | 1 |
| 13 | High voltage power supply 0-600V DC | 1 |
| 14 | Measuring tape | 1 |
| 15 | Meter rule (wooden 100cm) | 1 |
| 16 | Pendulum arrangement | 1 |
| 17 | Permittivity experiment kit | 1 |
| 18 | Physical weight box 50g | 1 |
| 19 | Power cord (main lead) | 2 |
| 20 | Resistance module 4.7 MW | 1 |
| 21 | Rod I-shape | 1 |
| 22 | Rod U-shape | 1 |
| 23 | Steel wool pack | 1 |