Bagaimana Cara Menggunakan Galvanometer?

Summary

This video script explains the use of a galvanometer, a device for measuring small electric currents in microamperes. It describes the galvanometer's neutral position at zero, with positive and negative scales indicating the direction of electric current. The script demonstrates how connecting a battery, wires, and a resistor to the galvanometer can show the current's direction by the needle's deflection. A rightward deflection indicates current entering the positive terminal, while a leftward deflection signifies the opposite. This concept will be used to explain Lenz's Law in future tutorials.

Takeaways

• 🔬 A galvanometer is typically used to measure very small electric currents, in the microampere range.
• 🎯 When there is no electric current, the galvanometer's needle points exactly at the center, at the 0 mark.
• ➡ The scale to the right of the 0 mark indicates positive electric current values, while the left indicates negative.
• 🔌 The galvanometer has two terminals on the front: a red one for positive and a black one for negative.
• 🔋 To demonstrate the galvanometer's operation, connect the positive terminal of a battery to the red terminal with a red wire, and the negative terminal to the black terminal with a black wire.
• ⚡ When the battery is connected correctly, the electric current flows from the positive terminal to the red terminal, and out from the black terminal to the negative terminal.
• 📈 The galvanometer's needle deflects to the right, indicating the direction of the current is from the positive to the negative terminal.
• 🔁 If the battery is reversed, the current will flow from the positive terminal to the black terminal, and out from the red terminal to the negative terminal, causing the needle to deflect to the left.
• 📉 The deflection of the galvanometer's needle corresponds to the direction of the current entering the terminals.
• 🔄 The concept of the needle's deflection will be used to explain Lenz's Law in a future tutorial.
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Q & A

What is a galvanometer typically used for?

A galvanometer is typically used for measuring very small electric currents, on a micro-ampere scale.

What is the position of the galvanometer's needle when there is no electric current?

When there is no electric current, the needle of the galvanometer will be exactly in the middle, pointing to the zero value.

What do the numbers next to the zero mark on the galvanometer indicate?

The numbers next to the zero mark indicate the value of the electric current, with the right side being positive and the left side being negative.

What is the purpose of having both positive and negative values on the galvanometer?

Having both positive and negative values helps to determine the direction of the electric current.

What do the red and black plugs in front of the galvanometer represent?

The red plug represents the positive terminal, while the black plug represents the negative terminal.

How do you connect the battery, wire, and resistor to understand how the galvanometer works?

Connect the positive terminal of the battery to the positive plug with a red wire, and connect the negative terminal of the battery to the negative plug with a black wire.

What happens to the galvanometer's needle when the electric current flows from the positive battery terminal to the positive plug?

When the electric current flows from the positive battery terminal to the positive plug, the galvanometer's needle will deflect to the right.

If the battery is reversed, how does the direction of the electric current change?

If the battery is reversed, the electric current will flow from the positive battery terminal to the negative plug, and then from the positive plug to the negative battery terminal.

What is the effect of reversing the battery on the galvanometer's needle deflection?

When the battery is reversed, the galvanometer's needle will deflect to the left.

What conclusion can be drawn from the deflection of the galvanometer's needle?

The direction of the galvanometer's needle deflection corresponds to the plug into which the electric current enters. Current entering the positive plug will cause the needle to deflect to the right.

How will the concept of the galvanometer's needle deflection be used in future tutorials?

The concept of the galvanometer's needle deflection will be used to explain Lenz's Law in the next tutorial.