When the free ends of a tester are dipped into a solution the magnetic needle shows deflection can you explain the reason?

Question: When the free ends of a tester are dipped into a solution the magnetic needle shows deflection can you explain the reason?

In this blog post, we will explore a fascinating phenomenon that occurs when the free ends of a tester are dipped into a solution. A tester is a device that consists of a coil of wire wrapped around a magnetic needle. When an electric current flows through the coil, it creates a magnetic field that aligns the needle in a certain direction. The tester can be used to detect the presence of electric currents in different materials or solutions.

One way to use the tester is to dip the free ends of the coil into a solution and observe the needle. If the needle shows deflection, it means that there is an electric current flowing in the solution. But how is this possible? How can a solution conduct electricity?

The answer lies in the chemical composition of the solution. A solution is a mixture of a solvent and one or more solutes. A solvent is a substance that dissolves other substances, such as water. A solute is a substance that is dissolved in the solvent, such as salt or sugar. Some solutes, such as salt, are called electrolytes because they dissociate into ions when dissolved in water. Ions are atoms or molecules that have an electric charge due to losing or gaining electrons.

When an electrolyte solution is in contact with the free ends of the tester, it forms a closed circuit with the coil. The ions in the solution act as charge carriers and allow electric current to flow through the circuit. The current then creates a magnetic field around the coil, which causes the needle to deflect. The direction and magnitude of the deflection depend on the polarity and strength of the current.

This experiment demonstrates that some solutions can conduct electricity and that electric currents can produce magnetic fields. It also shows how a simple device like a tester can be used to investigate the properties of different solutions. You can try this experiment at home with different solutions and see how they affect the needle. Have fun and stay curious!

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