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Brand: COMETEK
COMETEK 1 to 10000 Ohms Plug Type Resistance Box, High Precision Constantan Coil Physics Lab Apparatus
SKU: TB-CO-73461
Estimated Delivery By: Jun 21 - Jun 23 
MRP : ₹1720 ₹1709
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Estimated Delivery By: Jun 21 - Jun 23 Easy Return
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₹1709 (Including GST)
MRP : ₹1720
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Short Description
Cometek 1 to 10000 Ohms Plug Type Resistance Box
High Precision Constantan Coil Physics Lab Apparatus
High Precision Constantan Coil Physics Lab Apparatus
Country of origin: India
Specifications
- Brand: COMETEK
- Resistance Range: 1 to 10,000 Ohms
Description
The Cometek 1 to 10000 Ohms Plug Type Resistance Box is specifically engineered for rigorous educational physics labs, college engineering projects, and calibration environments, this analog resistance standard offers dependable, step-by-step decade resistance manipulation. The premium Constantan wire coils, wound non-inductively to counter unwanted magnetic fields and maintain highly stable resistance values even under varying laboratory temperatures. The top panel layout features solid, heavy brass blocks separated by precision-cut gaps. When an ebonite-topped brass plug is firmly inserted into a gap, the current short-circuits across the heavy brass surface; removing a plug diverts the current through the corresponding resistance coil below. Housed within a beautifully crafted, seasoned teak wood case, this classic instrument is built to last through decades of student experiments.
Features
:- Low Contact Resistance: Massive brass block connectors guarantee negligible contact resistance across the bridge gaps.
- Non Inductive Coil Winding: Coils are doubled back on themselves before being wound, nullifying self-induction effects during AC or transient current usage.
- Heavy Duty Output Terminals: Equipped with two secure, screw type brass binding posts (labeled Output A and B) to accept standard patch cords or banana plugs.
Applications
:- Galvanometer Protection: Used as a temporary high series resistance to limit initial currents flowing through delicate galvanometers or ammeters.
- Potentiometer Experiments: Ideal for cell internal resistance determinations and comparing electromotive forces (EMF) in advanced physics labs.
- Wheatstone Bridge Experiments: Acts as the variable ratio arms or known resistance standard in classic bridge balance calculations.
- Ohm's Law Verification: Serves as a fundamental laboratory teaching aid across high schools and technical institutes to demonstrate current-voltage variations.
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