NEET Exam > NEET Videos > Physics Class 12 > Conversion of Galvanometer to Ammeter
Conversion of Galvanometer to Ammeter Video Lecture | Physics Class 12 - NEET
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FAQs on Conversion of Galvanometer to Ammeter Video Lecture - Physics Class 12 - NEET
| 1. What is a galvanometer and how does it work? |  |
Ans. A galvanometer is a device used to detect and measure small electric currents. It consists of a coil of wire placed in a magnetic field, which causes the coil to rotate when an electric current passes through it. The amount of rotation is proportional to the current strength.
| 2. Why would someone want to convert a galvanometer into an ammeter? | |
Ans. Galvanometers are typically used to measure small currents, but sometimes we need to measure larger currents. Converting a galvanometer into an ammeter allows us to measure larger currents by connecting a shunt resistor in parallel with the galvanometer, which divides the current and ensures accurate measurements.
| 3. What is the process of converting a galvanometer into an ammeter? | |
Ans. To convert a galvanometer into an ammeter, a low resistance shunt resistor is connected in parallel with the galvanometer. The value of the shunt resistor is carefully calculated to divide the current in a specific ratio, allowing the galvanometer to measure the remaining current accurately.
| 4. How can one determine the shunt resistor value for converting a galvanometer into an ammeter? | |
Ans. To determine the shunt resistor value, one needs to know the full-scale deflection current of the galvanometer and the desired current range for the ammeter. The shunt resistor is calculated using Ohm's law, where the shunt resistance is equal to the galvanometer resistance divided by the desired current range.
| 5. Are there any limitations or considerations when converting a galvanometer into an ammeter? | |
Ans. Yes, there are a few limitations and considerations. One important consideration is the power dissipation of the shunt resistor, as it will dissipate a significant amount of power when measuring larger currents. Additionally, the shunt resistor should have low resistance to minimize voltage drop and minimize the impact on the original circuit's current. Care should also be taken to ensure proper calibration and accuracy of the converted ammeter.
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Nov 21, 2024 Last updated |
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