E/m By Millikans Oil Drop Method E/m By Millikans Oil Drop Method

E/m By Millikans Oil Drop Method

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Product Details:

  • Display Manual Reading via Eyepiece Scale
  • Power Electrical
  • Usage For Determining the charge of electron (e) using Millikans Oil Drop Method in Physics Laboratory
  • Voltage 220 V AC, 50 Hz
  • Product Type Physics Experiment Apparatus
  • Material Sturdy Metal Base with Glass Chamber
  • Design Tabletop Rectangular Setup, Transparent Viewing Chamber
  • Click to view more
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E/m By Millikans Oil Drop Method Price And Quantity

  • 1 Unit
  • Fine Mist Dispenser Included
  • Parallax-Free Eyepiece
  • Shock-proof Construction with Earthed Connection
  • 10°C to 40°C (Room Temperature)
  • Transparent Glass Observation Cylinder
  • Fine Adjustment Knob for Plate Voltage
  • Factory Calibrated and Ready to Use
  • Gold-Plated Metal Plates
  • Physics & Electronics Laboratories, Educational Institutions
  • Approx. 20X
  • High Contrast Graduation with Micrometer Arrangement
  • 50 Hz
  • Oil Atomizer, Power Cord, User Manual
  • Non-slip Rubber Feet for Tabletop Mounting
  • Powder-Coated Anti-Corrosive Body

E/m By Millikans Oil Drop Method Product Specifications

  • 220 V AC, 50 Hz
  • Physics Experiment Apparatus
  • 310 mm x 260 mm x 230 mm (Approx)
  • Optical microscope with attached viewing eyepiece
  • High Precision (as per standard laboratory requirements)
  • Electrical
  • Manual Reading via Eyepiece Scale
  • Built-in Halogen Lamp for Illumination
  • For Determining the charge of electron (e) using Millikans Oil Drop Method in Physics Laboratory
  • Tabletop Rectangular Setup, Transparent Viewing Chamber
  • Sturdy Metal Base with Glass Chamber
  • Approx. 6 kg
  • Mains Electricity
  • Not Applicable (Manual setup)
  • Fine Mist Dispenser Included
  • Parallax-Free Eyepiece
  • Shock-proof Construction with Earthed Connection
  • 10°C to 40°C (Room Temperature)
  • Transparent Glass Observation Cylinder
  • Fine Adjustment Knob for Plate Voltage
  • Factory Calibrated and Ready to Use
  • Gold-Plated Metal Plates
  • Physics & Electronics Laboratories, Educational Institutions
  • Approx. 20X
  • High Contrast Graduation with Micrometer Arrangement
  • 50 Hz
  • Oil Atomizer, Power Cord, User Manual
  • Non-slip Rubber Feet for Tabletop Mounting
  • Powder-Coated Anti-Corrosive Body

E/m By Millikans Oil Drop Method Trade Information

  • 5 Unit Per Week
  • 4-5 Days
  • Australia, North America, South America, Eastern Europe, Western Europe, Middle East, Central America, Asia, Africa
  • All India

Product Description

E/m by Millikan`s Oil Drop Method

Millikans oil Drop Apparatus is used to measure the Elementary Electric Charge. To achieve this, tiny charged droplets of oil are finely sprayed into two metal electrodes placed horizontally. Heavier drops tend to fall downwards fastly due to their thermal velocity but the lighter ones remain almost steady inside the metal electrode condenser chamber. An adjustable electric voltage is applied between the metal electrode plates which creates an electric field inside the condenser chamber. By adjusting the electric voltage, drops can be moved upwards or downwards according to their charge.

In the original design of Millikans oil drop apparatus, it was not easy to locate the oil drops in the condenser because the setting was critical. Therefore, keeping this thing into consideration, we made some improvements in the original design of this instrument, hence, making it user and student friendly.

With just minor settings, Millikans Oil Drop Apparatus is capable of producing bright and large number of oil drops can be seen in the condenser enabling the students to perform the experiment with great accuracy and comfort.

Technical Specifications

Stable triangular base that supports the main steel pillar on which lamp house, condenser, microscope and atomizer system is mounted.

Lamp house encloses a 12 Volt SMD LED and a condenser lens to focus the bright light on the oil drops. It can be adjusted in the horizontal plain by a slow motion screw.

Condenser plates are made of brass mounted at the top of the central pillar insulated from the rest of the apparatus. Top plate has a small hole through which sprayed oil drops enter into the condenser chamber, separated by a distance of approx 6 to 7mm. and are also provided with terminals for power supply connections.

Oil used by the automiser is Mustard Oil.

Power supply has AC 300 Volt HT and AC 10 Volts LT.




Precision Measurement for Fundamental Physics

This Millikans Oil Drop setup provides an accurate and reliable means to determine the electronic charge (e) by allowing precise manipulation and observation of oil droplets within an electric field. Designed for use in educational and research laboratories, its transparent chamber and integrated halogen lamp enhance visibility, while the calibrated micrometer and parallax-free eyepiece support high-precision readings.


Robust Design with Enhanced Safety

Built with a sturdy metal base, anti-corrosive powder-coated finish, and gold-plated electrodes, the apparatus is engineered to withstand intensive laboratory use. Safety features such as the shock-proof construction and earthed connection minimize risk, making it ideal for consistent operation in academic and research environments.


Ready-to-Use Convenience for Instructors and Students

Delivered factory-calibrated, this unit is simple to set up on any laboratory tabletop thanks to non-slip rubber feet. Key accessoriesincluding an oil atomizer, user manual, and power cordare included, ensuring the instrument is ready for immediate experimental use.

FAQs of E/m By Millikans Oil Drop Method:


Q: How do you operate the Millikan Oil Drop Apparatus using the transparent glass observation cylinder?

A: To operate the apparatus, fill the glass cylinder with air, use the included oil atomizer to introduce fine mist droplets, and observe the suspended drops through the parallax-free eyepiece. Adjust the electric field via the fine adjustment voltage knob to balance the oil drops, enabling precise determination of their charge.

Q: What steps are involved in determining the electrons charge with this instrument?

A: The process involves generating oil drops using the atomizer, then using the microscope to track a droplets movement within an electric field established by gold-plated electrodes. By adjusting the plates voltage and taking precise measurements with the micrometer scale, users can calculate the charge on individual oil droplets using Millikans method.

Q: When is calibration or maintenance required for this instrument?

A: The apparatus is factory calibrated and ready to use upon delivery. Routine maintenance involves verifying the cleanliness of the observation cylinder, ensuring the oil atomizer is functioning properly, and checking that electrical connections remain secure. Calibration is generally not needed unless specified by laboratory standards.

Q: Where can this oil drop method apparatus be used effectively?

A: This unit is ideal for physics and electronics laboratories within educational institutions, research centers, or university facilities that teach or analyze fundamental physical constants, specifically the charge of the electron.

Q: What is the primary benefit of using this setup in educational labs?

A: The primary benefit is its ability to deliver highly precise measurements essential for demonstrating and understanding fundamental atomic physics concepts, all while ensuring safety and ease of use for both instructors and students.

Q: How does the parallax-free eyepiece and high-contrast graduation enhance measurement accuracy?

A: The parallax-free eyepiece ensures users view the scale directly without angular error, while the high-contrast graduated micrometer scale guarantees small movements and distances can be measured clearly and accurately, resulting in more reliable experimental data.

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  • No-2509, Bengali Mohalla, Kali Bari Road,Ambala Cantt - 133001, Haryana, India
  • Phone :91-171-4002637
  • 09416070580
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  • Mr Manish Aggarwal (Proprietor)
  • Mobile :+919416040200, +919416070580
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