Engineering Physics Viva
…..And Then There Is Physics
HELMHOLTZ GALVANOMETER
It is named after the German scientist Hermann Ludwig Ferdinand von Helmholtz.
Q.What is Helmholtz Galvanomete r?
A. A H elmholtz galvanometer , like other galvanometers , is an instrument which can be use to measure dc current in the circuit. It is an improved form of the tangent galvanometer. .
Q. On what principle is Helmholtz Galvanometer based?
A. It is based on Tangent Law,which states that when two magnetic fields are acting perpendicular to each other, then for a given restoring field deflecting field is directly proportional to tangent of the angle made by resultant with restoring field.
Q.How does the field along the axis of coil vary?
A.The field F at distance x from the center of the coil of radius r is defines as:
F=(2*3.14*n*i*r)/10(r*r+x*x)^3/2
where n is the number of turns and i is the current flowing through the coil.
Q.What is the magnitude of of field at the center?
A. For F at center,x=0,
F=(2*3.14*n*i)/10*r
Q.How can we increase the region of uniform field?
A.By using two identical coils placed co-axially at a distance equal to their radius.
Q.Define Tangent Law.
A. F=H tan θ,where H & F are mutually perpendicular magnetic fields.
Q.Why is it necessary to set the plane of coil in the magnetic meridian?
A.To make the magnetic field produced by the coils at ninety degrees to the horizontal component of Earth’s magnetic field.
Q.What is magnetic meridian ?
A. A plane passing through the axis of magnetic needle freely suspended through it’s center of gravity & is at rest under Earth’s magnetic field.
Q.How is the error in measurement of deflection eliminated if the coil is not exactly placed in the magnetic meridian?
A.By passing current in one direction and then in reverse direction and then taking the mean of the four readings.we get deflection free from error.
Advantages of Helmholtz Galvanometer over Tangent Galvanometer.
Tangent galvanometer has uniform magnetic field only at the center while Helmholtz has it between the two coils.Helmholtz galvanometer is more sensitive.At the same current Helmholtz produces more deflection and field.
Helmholtaz galvanometer
Share this:
7 thoughts on “ helmholtz galvanometer ”.
It’s very fine viva question and answers.
nice matter
VERY HELPFULL
Students need more information about this experiment..give more information.tq
Thank you.. All my answers are get..
Very informative
Leave a comment Cancel reply
Website Powered by WordPress.com .
An ongoing discussion about SAP infrastructure
Ideas for Life
Life unfolds through a myriad of experiences, a harmonious blend of highs and lows beckoning for your insight. Immerse yourself in the depths of introspective poems and tales awaiting your discovery here.
- Already have a WordPress.com account? Log in now.
- Subscribe Subscribed
- Copy shortlink
- Report this content
- View post in Reader
- Manage subscriptions
- Collapse this bar
1) What is an Ammeter?
The magnitude of current flowing in a circuit can be determined by a device which is known as an ammeter. An ammeter measures both direct current and alternate current, and also it works with or without the presence of the magnetic field.
2) What is a Galvanometer?
To detect the direction and strength of a small current present in a circuit, a device is used, which is known as a galvanometer. A galvanometer only measures the direct current, and it works in the presence of the magnetic field.
3) How can a galvanometer be used as an ammeter?
A large current can be detected by converting a galvanometer into an ammeter. Since a galvanometer is a device used to detect or measure small currents, to alter a galvanometer into an ammeter, a shunt resistance is connected parallel to the galvanometer where the shunt resistance is a resistance of low value.
4) What is shunt resistance?
Shunt resistance is a resistance of low value. A shunt resistor is made using a material of low-temperature coefficient resistance value. It can be used for measuring the range to which it is extended when it is connected in parallel with an ammeter. And the current through the load can be determined when the same shunt resistance is connected in series with the load. For converting a galvanometer into an ammeter, shunt resistance is used.
5) What is the reduction factor?
In order to produce 45∘ deflection in a galvanometer, a current is required, which is known as a reduction factor; it is used in a tangent galvanometer. The reduction factor is measured in ampere and denoted by K.
6) Why is an ammeter always connected in series?
Since the internal resistance of an ammeter is low, it is always connected in series. There are high chances of short-circuiting if the ammeter is connected in parallel.
7) How does current electricity differ from static electricity?
As the name suggests, static electricity is static, whereas current electricity is dynamic. The form of electricity in which charges constantly flow is known as current electricity.
8) What is Static Electricity?
Fundamentally, the phenomenon of static electricity rises when the positive and negative charges are divided. Electric charges that build up on the surface of materials or substances are known as static electricity. These electric charges remain static until they are discharged or grounded. This type of electricity is formed due to friction.
9) What is a Voltmeter?
The potential difference or voltage among two points of an electronic or electrical circuit is measured using an instrument which is known as a voltage metre or voltmeter.
10) What is the working principle of a voltmeter?
A voltmeter is that it must be connected in parallel to the circuit in which the voltage has to be measured; this is the basic principle of a voltmeter. A voltmeter is built in such a way that it has a very high resistance value, and this is the reason why a parallel connection is used.
- Practical Procedure
- Galvanometer, Ammeter and Voltmeter
- Important Questions
- Mark Wise Questions
Stay tuned to BYJU’S and Fall in Love with Learning!
Register with BYJU'S & Download Free PDFs
Register with byju's & watch live videos.
You are now being redirected to mayfile.online....
IMAGES
VIDEO
COMMENTS
A Helmholtz galvanometer , like other galvanometers , is an instrument which can be use to measure dc current in the circuit.It is an improved form of the tangent galvanometer. . ... It's very fine viva question and answers. Like Like. Reply. Anonymous says ... August 7, 2017 at 3:04 pm. Students need more information about this experiment ...
Ans: He= Q7 needle of tangent galvanometer move with increasing or decreasing current? Ans: The galvanometer is oriented so that the plane of the coil is vertical and aligned along parallel to the horizontal component He of the Earth's magnetic field (i. parallel to the local "magnetic meridian").
Helmholtz Galvanometer Viva Questions And Answers Alexander M. Wyglinski,Robin Getz,Travis Collins,Di Pu Physics Practical for Engineers with Viva-Voce Chandra Mohan Singh Negi,2018-06-30 This is one of enumerable self-help or how to books with an emphasis on Engineering Physics Practical. The basic premise of the book is that there are
For Experimenthttps://youtu.be/T4t3GYct1Eg#viva #vmf
To Determine Resistance of a Galvanometer by Half-Deflection Method and to Find Its Figure of Merit - Physics Practical Class 12 Viva Questions with Answers What is a galvanometer? Answer: A galvanometer is a measuring device that measures a small electrical current or a function of the current by deflection of a moving coil.
Helmholtz Galvanometer Viva Questions And Answers Salvatore Califano. Content Physics Practical for Engineers with Viva-Voce Chandra Mohan Singh Negi,2018-06-30 This is one of enumerable self-help or how to ... You will get a rudimentary understanding of the basic concepts behind the Engineering Physics experiment
The most important questions of the experiment Horizontal Component of earth's Magnetic Field by Tangent Galvanometer===== Thanks for...
Precautions 2 Viva-voice questions. 1 Objective: To determine the Electro - Chemical Equivalent (ECE) of copper using a. Tangent galvanometer. 1 Apparatus used: Copper voltmeter, Tangent galvanometer, Rheostat, one way key, Battery, Commutater, Stop watch, Sand paper and connecting wire.
For more videos of physics experiment you may visit my channelhttps://www.youtube.com/channel/UC3cfhxM_qPL5zBvlCFcSmJw.
6. Let the calculated length of the wire be 10 cm. Then cut 3-4 cm extra and put it in parallel to the galvanometer and complete the circuit as shown in Fig. E 7.1. 7. Adjust the length of the wire so that when we see full scale deflection in the galvanometer, the current in the ammeter is. 30 mA.
Part 2 Procedure - Magnetic Field at the Center of a Helmholtz Coil: Measure the radius of the Helmholtz coil and record the number of turns. Connect the Helmholtz coil to the DC power supply. You may want to use a digital multi-meter in the 20A yellow input to obtain an accurate reading of the current.
Helmholtz Galvanometer Viva Questions And Answers George Johnson Physics Practical for Engineers with Viva-Voce Chandra Mohan Singh Negi,2018-06-30 This is one of enumerable self-help or how to books with an emphasis on Engineering Physics Practical. The basic premise of the book is that there are
#Helmholtz Galvanometer, # Physics lab Viva, #Magnetic meridian, #Reductio Factor|, #Tangent Galvanometer, #Physics Lab Viva, Viva Voce exam, # Lab Viva , #...
Helmholtz Galvanometer Viva Questions And Answers Lawrence Lessing Physics Practical for Engineers with Viva-Voce Chandra Mohan Singh Negi,2018-06-30 This is one of enumerable self-help or how to books with an emphasis on Engineering Physics Practical. The basic premise of the book is that there are
Experiment No. 1. Experiment No. 1. ltz Coils)Aim To study the variation of magnetic field with position of paired coils in Helmholtz arrangement along the axis of the coils. ying current. To study the principle of super imposition o. magnetic field.To calculate the ra.
Helmholtz Galvanometer Viva Questions And Answers Frank Lewis Dyer,Thomas Commerford Martin Physics Practical for Engineers with Viva-Voce Chandra Mohan Singh Negi,2018-06-30 This is one of enumerable self-help or how to books with an emphasis on Engineering Physics Practical. The basic premise of the book is that there are
A large current can be detected by converting a galvanometer into an ammeter. Since a galvanometer is a device used to detect or measure small currents, to alter a galvanometer into an ammeter, a shunt resistance is connected parallel to the galvanometer where the shunt resistance is a resistance of low value. 4) What is shunt resistance?
This video covers the most important viva questions from ballistic galvanometer based physics lab experiments.Thanks for WatchingPlease leave a LIKE to Suppo...
3 Helmholtz Galvanometer Viva Questions And Answers Published at 88.80.191.195 shown. The author convincingly demonstrates that practices, methods, and language shaped the development of the field, and are a key to understanding the mergence of the modern academic discipline. Mathematicians and physicists, as well as
Immerse yourself in the artistry of words with Crafted by is expressive creation, Immerse Yourself in Helmholtz Galvanometer Viva Questions And Answers . This ebook, presented in a PDF format ( PDF Size: *), is a masterpiece that goes beyond conventional storytelling. Indulge your senses in prose, poetry, and knowledge.
Hello friends welcome, in this video we will discuss about the viva questions related with VIVA QUESTIONS ON GALVANOMETER INTO AMMETER EXPERIMENT.in this vid...
Hi everyone, In this video I have discussed the concept of helmhotz Galvanometer. A question based on it also came in CSIR NET Physics 2022 exam. If you like...