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A current would register on a galvanometer when there is a flow of electric charge through the circuit that the galvanometer is connected to. The galvanometer measures the strength and direction of the current passing through it, displaying this information as a deflection on its dial.
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What is a galvanometer called when calibrated to read current?
A galvanometer calibrated to read current is called an ammeter. It is used to measure the flow of electric current in a circuit.
What is effect of interchanging the galvanometer and driver cell in meter bridge?
Interchanging the galvanometer and driver cell in a meter bridge would reverse the deflection of the galvanometer. The direction of current through the bridge wire would also change, affecting the balance point. The new balance point will now represent a different ratio of the unknown resistance to the known resistance.
Is galvanometer used in ac circuits if not why?
firstly a galvanometer instrument measures very small amounts of current flow of a D,C, nature / type . an a.c. type circuit is likely to be of a high magnitude , such that it would render the instrument unusable and dangerous to the operator . also a galvanometer by design is known as a moving coil type meter , if an ac signal were to be connected to this, the rate of change of the ac signal voltage would be so fast / frequent that the user would be unaware that the signal is currently changing
What happens to a galvanometer when a magnet is flicked across the coil?
It should deflect to the left (negative) based on the experiment I did a few days ago in lab but I could be wrong. ============================= Doesn't that depend on which end of the coil goes to which end of the meter ?? After you finished the experiment and made note of the meter's deflection, you could leave everything exactly as it is, but get up, walk around to the other side of the table with the magnet, insert the S-pole into the other side of the coil, and I guarantee the meter would deflect in the opposite direction. The configuration is not adequately specified in the question.
How do you study earth's magnetic field using a tangent galvanometer?
The expression for tan @ is F/B Here F = mu not n I / 2a mu not = permiability of air which equals to 4pi x 10-7 H/m n = number of turn in the TG a - radius of coil in TG in meter I = the current flowing through in ampere B is the earth's magnetic field. Hence B = F / tan@ Here @ is the angle of deflection in the TG when two perpendicular fields are applied. Here one is earth's magnetic field whose induction is B tesla and F is the magnetic field produced due to flow of current in the TG coil
What is a galvanometer called when calibrated to read current?
A galvanometer calibrated to read current is called an ammeter. It is used to measure the flow of electric current in a circuit.
What value of resistance is used to convert galvanometer into voltmeter?
It depends on the resistance of the galvanometer and its full scale current. A 100 ohm meter reading 1 milliampere would require 0.1 volts to reach full scale, so it would require about 0.1 ohms in parallel to become a 1 ampere ammeter.
What is effect of interchanging the galvanometer and driver cell in meter bridge?
Interchanging the galvanometer and driver cell in a meter bridge would reverse the deflection of the galvanometer. The direction of current through the bridge wire would also change, affecting the balance point. The new balance point will now represent a different ratio of the unknown resistance to the known resistance.
What resistance value is add to convert a galvanometer into a voltmeter?
It depends on the resistance of the galvanometer and the current required to reach full scale. A 100 ohm meter requiring 1 milliampere would require 99.9 KOhms in series to become a 100 volt voltmeter.
What does a regrettable state of affairs mean?
A state of affairs is the current set of circumstances, so a regrettable state of affairs would be disappointment with the current set of circumstances.
Is galvanometer used in ac circuits if not why?
firstly a galvanometer instrument measures very small amounts of current flow of a D,C, nature / type . an a.c. type circuit is likely to be of a high magnitude , such that it would render the instrument unusable and dangerous to the operator . also a galvanometer by design is known as a moving coil type meter , if an ac signal were to be connected to this, the rate of change of the ac signal voltage would be so fast / frequent that the user would be unaware that the signal is currently changing
Why do you connect galvanometer in series?
You connect a galvanometer in series with the circuit being measured, because the galvanometer is a form of ammeter, although an extremely sensitive one, and ammeters measure the current in a series circuit.
What is a galvanometer?
a device designed to measure small electric currents; the simplest electric meterA galvanometer is an instrument for detecting and measuring small electric currents.Or use this long answer: galvanometer , instrument used to determine the presence, direction, and strength of an electric current in a conductor. All galvanometers are based upon the discovery by Hans C. Oersted that a magnetic needle is deflected by the presence of an electric current in a nearby conductor. When an electric current is passing through the conductor, the magnetic needle tends to turn at right angles to the conductor so that its direction is parallel to the lines of induction around the conductor and its north pole points in the direction in which these lines of induction flow. In general, the extent to which the needle turns is dependent upon the strength of the current. In the first galvanometers, a freely turning magnetic needle was hung in a coil of wire; in later versions the magnet was fixed and the coil made movable. Modern galvanometers are of this movable-coil type and are called d'Arsonval galvanometers (after Arsène d'Arsonval, a French physicist). If a pointer is attached to the moving coil so that it passes over a suitably calibrated scale, the galvanometer can be used to measure quantitatively the current passing through it. Such calibrated galvanometers are used in many electrical measuring devices. The DC ammeter , an instrument for measuring direct current, often consists of a calibrated galvanometer through which the current to be measured is made to pass. Since heavy currents would damage the galvanometer, a bypass, or shunt, is provided so that only a certain known percentage of the current passes through the galvanometer. By measuring the known percentage of the current, one arrives at the total current. The DC voltmeter , which can measure direct voltage, consists of a calibrated galvanometer connected in series with a high resistance. To measure the voltage between two points, one connects the voltmeter between them. The current through the galvanometer (and hence the pointer reading) is then proportional to the voltage.
Why DC ammeter or voltmeter is not used in AC circuits?
Short answer, because it is designed for DC, not AC.In AC, the current goes back and forth all the time; the average current is zero. And that's what a galvanometer that is not especially designed for AC would show.
Why is one need to turn off the circuit in between measurement when using the wheatstone bridge?
Removing the resistor that you are measuring while the circuit is still on, would create an excessive amount of current to flow through the galvanometer, possibly damaging it.
Why would an organization have a file register?
why would an organisation have a file register
Where can one register for high interest money market accounts?
You can register high interest money making accounts at your current banking institution. There are also several non traditional online banks that would be willing to help you with these services.
