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Last updated: 22 October 2026
Quick Answer
Verification of Various Laws is a range of panel apparatus for physics and electronics practicals that verify circuit laws and study signals: Ohm's law, resistances in series and parallel, galvanometer conversion, capacitor charging and the RC time constant, neon flashing, LCR power factor, RC filters, peak, average and RMS values, clipping, clamping and rectifiers, plus BH curve and Stefan's law set-ups. JLab currently lists 13 items in this category.
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Explore the Verification of Various Laws Range
| Range | Items | What it covers |
|---|---|---|
| DC Circuit Laws and Meter Conversion | 4 | Two Ohm's law panels with moving coil meters and a wire-wound potentiometer for a 6 V battery, resistances in series and parallel, and conversion of a galvanometer into a voltmeter and current meter. |
| Capacitor and AC Circuit Experiments | 5 | RC time constant with a microammeter, neon flashing on 100 V DC with three paper capacitors, LCR power factor on 100 V AC, RC low-pass and high-pass filters, and peak, average and RMS values. |
| Clipping, Clamping and Rectifier Circuits | 2 | Positive and negative clipping and clamping of a sine wave, and efficiency and ripple factor of half-wave, full-wave and bridge rectifiers on load with a filter circuit kit. |
| BH Curve and Stefan Law Apparatus | 2 | Hysteresis (B-H) curve tracing from a 3-15 V AC supply with provision for an external inductance, and Stefan's law with the filament of a 6 V bulb. |
Verification of Various Laws Specifications
Each row gives the experiment and the supply, meters or components stated on that panel's own page, grouped by DC laws, capacitor and AC circuits, diode circuits and other set-ups.
DC Circuit Laws and Meter Conversion (4)
| Product | Specification |
|---|---|
| Ohm's Law Apparatus | Experiment: Verification of Ohm’s law (V = IR); Meters: Two moving coil meters, for voltage and current; Voltage control: One wire-wound potentiometer. |
| Resistances in Series and Parallel Apparatus | Experiment: Verification of the properties of resistances in series and in parallel; Meters: Two moving coil meters, one for voltage and one for current; Dimensions: 10 x 8 x 3 inches (about 25 x 20 x 8 cm). |
| Conversion of Galvanometer Into a Voltmeter and Current Meter | Experiments: Conversion of a galvanometer into a voltmeter and into a current meter; Power supply: DC regulated, 0–10 V DC / 500 mA; Resistances: Three sets, mounted on the panel. |
Capacitor and AC Circuit Experiments (5)
| Product | Specification |
|---|---|
| Charging and Discharging of Condenser | Experiment: RC time constant, using various sets of resistances and capacitors; Power supply: DC, with a selector switch for different voltages; Meter: One microammeter. |
| Flashing and Quenching of Neon | Experiment: Calculation of the charge and discharge time of a condenser; Power supply: High-voltage DC, 100 V DC / 30 mA; Capacitors: Three, paper type, selected with toggle switches. |
| LCR Impedance Circuit | Experiment: AC power factor of a series LCR circuit; Power supply: AC, 100 V, selected with a band switch; Components: One resistance, one capacitor and one inductance, connected. |
| RC Circuit Transient Response | Experiment: RC circuit as a low-pass and a high-pass filter; Components: Three resistances and three capacitors; Circuit diagrams: Printed, for the low-pass and high-pass filters. |
| Measurement of Peak, Average and RMS Value of an AC Signal | Signal source: Sine wave generator; Transformer: Step-down transformer; Circuit diagram: Printed, for peak and average value measurement. |
Clipping, Clamping and Rectifier Circuits (2)
| Product | Specification |
|---|---|
| Clipping and Clamping Circuit Apparatus | Experiment: Effect of positive and negative clipping and clamping on a sine wave; DC power supplies: Two, fixed output, connected in series with the diodes for positive and negative clipping; Dimensions: 8 x 6 x 4 in (about 20 x 15 x 10 cm). |
| Half Wave, Full Wave and Rectifier Apparatus | Experiments: Efficiency and ripple factor of half-wave, full-wave and bridge rectifiers on load; study of filters; Rectifying elements: Junction diodes; Load: Load resistances selected with toggle switches. |
BH Curve and Stefan Law Apparatus (2)
| Product | Specification |
|---|---|
| BH Curve Apparatus with Different Material | Experiment: Tracing hysteresis (B–H) curves; Power supply: AC, 3–15 V AC, output selected with a band switch; External inductance: Provision for connecting an external inductance. |
| Study of Stefan's Law | Experiment: Verification of Stefan’s law using an electric bulb; Radiating body: One 6 V bulb (its filament); Temperature measurement: Indirect: filament resistance is calculated, then converted with a standard resistance versus temperature relationship. |
Who Buys This Range
Physics laboratories in senior secondary schools and colleges where students verify Ohm's law, resistances in series and parallel and Stefan's law, and electronics laboratories that use the rectifier, clipping and clamping, RC filter and LCR circuit panels with a function generator and C.R.O.
Frequently Asked Questions
Which capacitor experiments does this range cover?
The Charging and Discharging of Condenser panel finds the RC time constant with a set of resistors and capacitors and a microammeter, the Flashing and Quenching of Neon set-up times charge and discharge with three paper capacitors and a neon lamp on 100 V DC, and the RC Circuit Transient Response panel shows low-pass and high-pass filtering.
How does the Study of Stefan's Law apparatus find the filament temperature?
It uses the filament of a 6 V bulb as the radiating body. Power comes from the voltmeter and current meter readings, and the temperature is found indirectly by calculating the filament resistance and converting it with a standard resistance versus temperature relationship.
Request a Quote
List the panels and quantities you need, for example the Ohm's Law Apparatus or the BH Curve Apparatus with Different Material, and send them to us on the contact page.
Measurement of Peak, Average and RMS Value of an AC Signal
Product Code : EL-VOVLACOS-1101
Instrument consists of Sine Wave generator, Step Down Transformer, Circuit Diagram for Peak & average Value measurement Printed and connections brought on terminals.
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Resistances in Series and Parallel Apparatus
Product Code : EL-VOVLACOS-1102
To verify properties of Resistances when connected in series & parallel.
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Ohm's Law Apparatus
Product Code : EL-VOVLACOS-1104
Apparatus to verify Ohm's law (V = IR), with two moving coil meters for voltage and current and one wire-wound potentiometer.
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Conversion of Galvanometer Into a Voltmeter and Current Meter
Product Code : EL-VOVLACOS-1108
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RC Circuit Transient Response
Product Code : EL-VOVLACOS-1111
To study RC circuit as Low Pass & High Pass Filters.
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Clipping and Clamping Circuit Apparatus
Product Code : EL-VOVLACOS-1112
To study effect of Positive & Negative Clipping & Clamping on Sine Wave.
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Half Wave, Full Wave and Rectifier Apparatus
Product Code : EL-VOVLACOS-1113
Apparatus to study efficiency and ripple factor of half-wave, full-wave and bridge rectifiers on load, and filters. 10 x 8 x 4 in; optional digital AC millivoltmeter.
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Study of Stefan's Law
Product Code : EL-VOVLACOS-1114
The temperature of the filament can be determined indirectly by first computing the electrical resistance and then using a standard resistance versus temperature relationship.
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