Precision Brass Wire 100gm

Quick Answer: The Precision Brass Wire 100gm is brass wire supplied by weight in a 100 g quantity for physics experiments and practical projects. Brass, an alloy of copper and zinc, is non-magnetic, easy to solder and resists rust, and it conducts electricity less well than pure copper.

Where Brass Wire Earns Its Place

Brass sits between copper and the resistance alloys in electrical behaviour. Its resistivity is several times that of copper, so a length of brass wire shows a measurable resistance on a meter bridge without needing to be very long, while it remains a much better conductor than nichrome or constantan. That makes brass wire 100gm useful for resistivity experiments in which students compare metals of known cross-section.

Being non-magnetic, brass behaves quite differently from steel. On a sonometer, a brass wire will not respond to an electromagnet, but it will vibrate if alternating current is passed through it while the poles of a permanent magnet straddle it, because the force then acts on the current itself. Setting brass and steel wire side by side in these experiments shows students exactly which physical effect is at work.

Outside electrical work, brass bends cleanly, holds a shape and takes solder readily, so labs use it for hooks, pointers, supports for light apparatus and small repairs. It tarnishes to a darker gold over time but does not rust.

Specifications

Applications

• Measuring resistivity with a meter bridge or ammeter-voltmeter method
• Sonometer experiments where AC flows through the wire between magnet poles
• Making hooks, pointers and light supports for apparatus
• Comparing magnetic and non-magnetic metals alongside iron and steel wire

Care & Handling

• Store the brass wire 100gm coil in a closed bag so it does not kink or tarnish quickly.
• Straighten short lengths by pulling gently between two pliers rather than bending back and forth, which work-hardens and weakens brass.
• Wear eye protection when cutting; springy offcuts can fly.

Why Choose LabEquip

Physics teachers order brass wire by weight so they can cut the lengths each practical needs. LabEquip lists it in the General Items range beside other wires for comparison experiments; send quantities through the contact page.

Frequently Asked Questions

How does brass wire compare with copper wire in a circuit?

Brass conducts, but its resistivity is several times higher than copper’s, so a brass lead of the same size has more resistance. Copper is used for connecting leads; brass is used when a measurable resistance or a stiffer, solderable wire is wanted.

Is brass wire magnetic?

No. Brass is an alloy of copper and zinc, neither of which is ferromagnetic, so a magnet does not attract it. That makes it a clear contrast to iron and steel in magnetism lessons.

Can brass wire be used on a sonometer?

Yes, with the method that passes alternating current through the wire between the poles of a horseshoe magnet. It will not work with an electromagnet drive, which only attracts ferromagnetic wire such as steel.

How do I find the resistivity of the wire?

Measure the resistance of a known length with a meter bridge or with an ammeter and voltmeter, and measure the diameter at several points with a screw gauge. Resistivity equals resistance times cross-sectional area divided by length.

Can brass wire be soldered?

Yes. Clean the surface with fine abrasive paper, apply flux and use ordinary electronics solder. Brass takes solder readily, which is one reason it is used for small supports and connections.

What diameter is the wire?

Only the 100 g weight appears in the listing. Ask for the diameter when ordering, because resistivity experiments need a thin wire, while hooks and supports need a thicker one.

Last Updated: September 2026