Bagaimana Cara Menggunakan Galvanometer?

Catatan Si Rebiaz

9 Dec 201802:21

Summary

TLDRThis 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.

Outlines

00:00

🔋 Understanding the Galvanometer

This paragraph introduces a galvanometer, a device commonly used to measure very small electric currents in the microampere range. It explains that when there is no electric current, the galvanometer's needle points directly at the center, at the zero mark, with positive values on the right and negative on the left, indicating the direction of the electric current. The galvanometer has two terminals, a red positive and a black negative, which are used to connect with a battery and resistor to demonstrate the galvanometer's operation. The needle's deflection to the right indicates current flowing into the positive terminal, while reversing the battery causes the needle to deflect to the left, indicating current flowing into the negative terminal. This behavior is used to explain the concept of Lenz's Law in future tutorials.

Mindmap

Keywords

💡Galvanometer

A galvanometer is an instrument used for detecting and measuring small electric currents, typically in the microampere range. In the context of the video, it is used to demonstrate the measurement of electric current and its direction. The script describes how the galvanometer's needle will deflect according to the direction of the current, which is a central theme of the video.

💡Microampere

Microampere refers to a unit of electric current where one microampere is equal to one millionth of an ampere. The video script mentions that the galvanometer measures very small currents 'Dalam skala mikro ampere', emphasizing the sensitivity of the instrument and its application in scenarios where the currents are not easily detectable by other means.

💡Electric current

Electric current is the flow of electric charge, and it is a fundamental concept in the study of electricity. The script explains that the galvanometer measures electric current, and the direction of the current is indicated by the deflection of the needle. This concept is central to understanding the operation and purpose of the galvanometer.

💡Deflection

Deflection in the context of the galvanometer refers to the movement of the needle in response to an electric current. The script describes how the needle 'menyimpang ke arah kanan' (deviates to the right) when the current flows in one direction, and to the left when the current flows in the opposite direction. This deflection is a key indicator of the current's presence and direction.

💡Positive and negative

These terms are used to describe the polarity of the electric current. The script mentions that the galvanometer has a positive and a negative terminal, indicated by red and black connectors respectively. The direction of the current, which is either positive or negative, affects the deflection of the galvanometer's needle, as demonstrated in the video.

💡Battery

A battery is a device that provides electrical energy by converting stored chemical energy into electrical energy. In the script, a battery is used as a power source to create an electric current, which is then measured by the galvanometer. The battery's positive and negative terminals are connected to the galvanometer to demonstrate its functionality.

💡Wire

Wires are used to conduct electricity from one point to another. The script describes the use of red and black wires to connect the battery to the galvanometer, establishing a circuit through which the electric current flows. The wires are essential for completing the circuit and allowing the measurement of the current by the galvanometer.

💡Resistor

A resistor is a component used to limit or regulate the flow of electric current in a circuit. Although not explicitly mentioned in the script, resistors are often used in conjunction with galvanometers to control the current being measured. In the context of the video, a resistor might be used to ensure that the current is within the measuring range of the galvanometer.

💡Circuit

A circuit is a closed path through which electric current flows. The script describes the setup of a simple circuit by connecting a battery, wires, and a galvanometer. The circuit is essential for demonstrating how the galvanometer measures the current, as it allows the current to flow and be detected by the instrument.

💡Lenz's Law

Lenz's Law is a principle in electromagnetism that states the direction of the induced current will be such that it opposes the change in magnetic flux that produced it. The script hints at using the concept of the galvanometer's deflection to explain Lenz's Law in a future tutorial, suggesting a deeper exploration of the relationship between electric current and magnetic fields.

Highlights

Galvanometer is commonly used to measure very small electric currents, in the micro-ampere range.

When there is no electric current, the galvanometer needle is centered at zero.

The galvanometer has markings indicating electric current values, with positive on the right and negative on the left.

The two types of values help to determine the direction of the electric current.

There are two connectors at the front, with red being positive and black being negative.

To understand how a galvanometer works, prepare a battery, wires, and a resistor.

Connect the positive terminal of the battery to the positive connector with a red wire.

Connect the negative terminal of the battery to the negative connector with a black wire.

Electric current flows from the positive terminal of the battery to the positive connector, then out from the negative connector to the negative terminal of the battery.

The galvanometer needle deflects to the right.

If the battery is reversed, the current flows from the positive terminal to the negative connector, then out from the positive connector to the negative terminal.

The galvanometer needle deflects to the left when the battery is reversed.

The deflection direction of the galvanometer needle corresponds to the connector through which the current enters.

Current entering the positive connector causes the galvanometer needle to deflect to the right.

This concept will be used to explain Lenz's Law in the next tutorial.

Don't forget to like, share, and subscribe for more educational content.