Video: Moving Coil Galvanometer

# Video: Moving Coil Galvanometer Video Lecture | Physics for JEE Main & Advanced

## Physics for JEE Main & Advanced

289 videos|635 docs|179 tests
Video Timeline

## FAQs on Video: Moving Coil Galvanometer Video Lecture - Physics for JEE Main & Advanced

 1. What is a moving coil galvanometer?
Ans. A moving coil galvanometer is a device used to detect and measure small electric currents. It consists of a coil suspended between the poles of a permanent magnet, which causes the coil to move when a current flows through it.
 2. How does a moving coil galvanometer work?
Ans. A moving coil galvanometer works on the principle of the interaction between a current-carrying coil and a magnetic field. When current flows through the coil, it experiences a torque that causes it to rotate. This rotation is proportional to the current passing through the coil, allowing for measurement.
 3. What are the applications of a moving coil galvanometer?
Ans. Moving coil galvanometers find applications in various fields such as physics, electronics, and electrical engineering. They are commonly used in instruments like ammeters, voltmeters, and multimeters to measure electric currents and voltages accurately.
 4. How can a moving coil galvanometer be used as an ammeter?
Ans. To use a moving coil galvanometer as an ammeter, a low resistance called a shunt is connected in parallel with the galvanometer. The shunt diverts most of the current, allowing only a fraction of it to pass through the galvanometer. By adjusting the shunt resistance, the ammeter can be calibrated to measure different ranges of currents.
 5. Can a moving coil galvanometer be used to measure alternating currents?
Ans. No, a moving coil galvanometer is not suitable for measuring alternating currents directly. This is because the coil's dynamics are optimized for measuring direct currents, and it cannot respond effectively to rapidly changing currents. However, by using additional circuitry like rectifiers, it is possible to measure the average value of an alternating current using a moving coil galvanometer.

## Physics for JEE Main & Advanced

289 videos|635 docs|179 tests

### Up next

Video Timeline
 Explore Courses for JEE exam
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Related Searches

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

;