Planck’s Constant LED Apparatus

Code: EPC7000

A multipurpose unit that allows the user to easily calculate Planck’s constant, to measure the wavelength of coloured light, demonstrate colour light transmission through colour filters and show the diffraction patterns for various wavelengths of coloured light using a range of 4 LEDs (Red, Yellow, Green and Blue) covering the light range from deep blue at 470nm to near IR at 940nm.

Description

Box mounted with 5 x 4mm sockets for attachment to an ammeter or voltmeter to display measurements. Monitoring the voltage of each LED a graph of energy input as a function of light frequency emitted can be measured with an approximate value of Plank’s constant calculated.

  • Supplied with 500 lines/mm diffraction grating
  • Designed and manufactured in the UK

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SettingsPlanck's Constant LED Apparatus removeIrwin De-Mountable Transformer remove2-12V AC/DC Powerlock removePowerlock Gratnells Tray Pack of 4 removeLamp Brightness Experiment removePortable Appliance Tester & Checker - PATCH remove
NamePlanck's Constant LED Apparatus removeIrwin De-Mountable Transformer remove2-12V AC/DC Powerlock removePowerlock Gratnells Tray Pack of 4 removeLamp Brightness Experiment removePortable Appliance Tester & Checker - PATCH remove
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Description

Code: EPC7000

A multipurpose unit that allows the user to easily calculate Planck's constant, to measure the wavelength of coloured light, demonstrate colour light transmission through colour filters and show the diffraction patterns for various wavelengths of coloured light using a range of 4 LEDs (Red, Yellow, Green and Blue) covering the light range from deep blue at 470nm to near IR at 940nm.
By connecting an ac power source to one of the coils and reading the voltage from the other coil transformer action (either step up or step down) may be readily demonstrated. The efficiency of the transformer may be studied –does the efficiency change if the laminate top is not firmly fixed? What happens if it is not present? Other more esoteric effects such as Magnetostriction may also be studied.

Code: EPU0115

The Powerlock power supply has both a lockable AC and DC outputs ranges by a simple key making it impossible for students to change the voltage. The Powerlock offers 2,4,6,8,10 and 12 in both DC and AC. Outputs may also be used simultaneously up to the rated output required. For safety, the output is also protected by a simple push button cut-out. Each unit is supplied with 2 that can be used on all Powerlock units if needed. Supplied with 2 keys.

Code: EPU0115PK4

Our compact Powerlock power supply now comes supplied in a 4 pack with a Gratnells deep tray for ease of storage. Offering 2, 4, 6, 8, 10, and 12 volts at currents of up to 5A. Both dc and ac outputs may be used simultaneously up to the rated output. The output is protected by a push button cut-out. The unit is 2A fused on the back panel and comes complete with a moulded mains lead and plug. Supplied with 2 keys.

Code: ELB8000

Students often think that the brightness of a lamp is only dependent on the current flowing through it. The unit allows the teacher to safely switch a 12V lamp in series with a mains lamp and study the current flow through them.  

Code: EPT5001

(Portable Appliance Tester and Checker). Performs electrical safety tests on portable appliances allowing compliance with EAWA regulations. The unit performs earth bond and insulation tests on both Class 1 and Class 2 appliances, extension leads, IEC and kettle leads etc. The unit is very simple to operate and gives clear, unambiguous pass/fail indications. Complete with test leads, instructions, pass and fail labels, a Tester's Certificate of Inspection and is fitted with moulded mains plug.
ContentBox mounted with 5 x 4mm sockets for attachment to an ammeter or voltmeter to display measurements. Monitoring the voltage of each LED a graph of energy input as a function of light frequency emitted can be measured with an approximate value of Plank's constant calculated.
  • Supplied with 500 lines/mm diffraction grating
  • Designed and manufactured in the UK

Code: L1017

A demountable transformer kit is an ideal way to demonstrate transformer action.  The kit comprises three coils, one with 300 turns, one with 600 turns and one with 1200 turns. These slide onto a laminated steel frame to form several possible transformer configurations.
  • Output voltages AC & DC
  • 2,4,6,8,10,12 voltage range in AC and DC
  • Current 5A
  • Voltage type - Stepped
  • Output type - Full wave rectified, non-regulated
  • Push button trip reset
  • Mains input 230/240V AC, 50Hz
  • Supplied with mains plug and lead
  • Manufactured in the UK
  • A robust power supply for powering laboratory experiments.
  • Heavy duty toroid transformer
  • Small footprint - 4 units fit in a Gratnells deep tray
  • Powder coated steel case
  • Switched output of 2V, 4V, 6V, 8V, 10V and 12V ac/dc controlled by a key lock
  • Two keys supplied with each Powerlock. Common key profile – any key fits any Powerlock
  • Total output current of 5A
  • AC and DC outputs may be used simultaneously up to rated current
  • Colour coded 4mm sockets
  • Push button cut-out
  • Manufactured in the UK
This includes kit includes the use of a safety mains lamp socket, which has a built in a switching system that only allows it to be switched on when a lamp is inserted.  We have also included two switches, which must be pressed simultaneously to route the mains current through the low voltage lamp. Furthermore, the switches are sited at opposite ends of the case, requiring two hands to operate them.  However, it must be appreciated that you are working with potentially lethal voltages and currents and therefore extra care should be taken.
  • Supplied with 1 x 240V 100W lamp and 1 x 12V 5W lamp and mains power lead.
A simple to use PAT machine that allows the user to perform Class1 and Class 2 insulation tests, earth bond tests at two different current levels and extension lead tests. The compact unit clearly displays the results via coloured LEDs. A single push button initiates all the tests in a 5-second cycle. •Class 1 Earth Bond test •Class 1 and Class 2 Electrical Insulation test •Mains switch and circuitry test •Extension Lead test •IEC lead test •Results are displayed by coloured LEDs.  Timed test period. Comes complete with 100 pass labels, 50 fail labels, Earth Bond Test lead, Extension lead test lead and full instructions including sample inspection certificate.
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