Why galvanometer cannot be used to measure current?

Last Update: April 20, 2022

This is a question our experts keep getting from time to time. Now, we have got the complete detailed explanation and answer for everyone, who is interested!

Asked by: Jevon Paucek
Score: 4.9/5 (69 votes)

The galvanometer is a very sensitive device. Hence, it may get damaged when a strong current is passed through the galvanometer. ... The galvanometer resistance is larger than the ammeter, if it is connected in series it will reduce the current flow through the circuit.

Can a galvanometer be used to measure current?

No, a galvanometer as such can not be used for measuring current as it is a very sensitive instrument as it shos full scale deflection even for a very small current.

Why we Cannot use galvanometer as an ammeter?

A galvanometer shows a full scale deflection with a very small current. Hence a galvanometer can measure limited current. Therefore as such, a galvanometer can not be used as an ammeter, which can measure the given large current.

Why is galvanometer used?

A galvanometer is used for measuring or for detecting small currents. But by converting a galvanometer into an ammeter large currents can be detected. To convert a galvanometer into an ammeter, a low resistance known as shunt resistance is connected parallel to the galvanometer.

Why galvanometer is not used in AC Bridge?

In AC bridge galvanometer is not used because the rotating torque is dependent on the average current that is passing through the coils of a galvanometer. Also, the average AC current passing through the AC bridge will be zero and there will not be any deflection.

Why a Moving Coil Galvanometer cannot be used to Measure AC

24 related questions found

Is used to measure voltage?

As its names implies, a “Voltmeter” is an instrument used for measuring voltage (V), that is the potential difference present between any two points within a circuit. To measure a voltage (potential difference), a voltmeter must be connected in parallel with the component whose voltage you wish to measure.

How can we measure voltage?

To measure voltage on an electronic circuit, you don't have to insert the meter into the circuit. Instead, all you have to do is touch the leads of the multimeter to any two points in the circuit. When you do, the multimeter displays the voltage that exists between those two points.

How do you measure voltage and current?

Measuring current and voltage
  1. Current is measured in amperes. Amperes is often abbreviated to amps or A. The current flowing through a component in a circuit is measured using an ammeter. ...
  2. Voltage is measured in volts, often abbreviated to V.
  3. The voltmeter must be connected in parallel with the component.

How do you use a multimeter to measure current?

Procedure to Measure AC Current using Analog Multimeter

Insert red probe in mA or A slot depending on the range of AC current being measured. Insert black probes into COM slot. Set range selector switch to AC form of current and select maximum range for the current measurement.

What is the unit of galvanometer?

What is the SI unit of the merit of the galvanometer? The Ampere unit is its SI unit.

What is the symbol of Key?

At its heart, a key is an opener of locks. Whether it's a door, a treasure chest, or the metaphorical heart, keys let us into unknown worlds. Keys symbolise freedom, they open things up and lock precious things away. They reveal secrets.

What is the principle of galvanometer?

A moving coil galvanometer works on the principle that a current-carrying coil placed in a magnetic field, experiences a torque. The coil springs along with the radial field ensure the deflection to be proportional to the strength of the current.

What is galvanometer and its function?

The function of the galvanometer is to detect the presence of electric current in a circuit. Galvanometer works on the principle of magnetic effects of electric current. If there is a current in the circuit, the needle in the galvanometer will show deflection.

What is the use of galvanometer in physics?

A galvanometer is a device that is used to detect small electric current or measure its magnitude. The current and its intensity is usually indicated by a magnetic needle's movement or that of a coil in a magnetic field that is an important part of a galvanometer.

Why do we convert galvanometer into voltmeter?

Galvanometers were the first instruments used to detect and measure electric currents. A galvanometer can be converted in to a voltmeter by connecting a high resistance in series connection within it. The scale is calibrated in volt. The value of the resistance connected in series decides the range of the voltmeter.

What are () called in English?

They can also be used in mathematical expressions. For example, 2{1+[23-3]}=x. Parentheses ( () ) are curved notations used to contain further thoughts or qualifying remarks. However, parentheses can be replaced by commas without changing the meaning in most cases.

What do three keys mean?

Keys - Three keys worn together symbolize the unlocking of the doors to health, wealth and love. Keys - Three keys worn together symbolize the unlocking of the doors to health, wealth and love.

What is the meaning of giving keys?

The Giving Keys is a pay-it-forward company that intends for their jewelry to be re-gifted. Each key has a word that holds a particular meaning to the wearer. Then when the time is right, they will pass the key to another person that needs the word.

What is SI unit of merit?

Figure of merit is the amount of current been passed in the unit of deflection in a galvanometer. Its SI unit is Ampere per division.

What is current unit?

The SI unit of current is ampere which measures the flow of electric charge across a surface at the rate of one coulomb per second. Since the charge is measured in coulombs and time in seconds, so the unit is coulomb/Sec (C/s) or amp.

What is the SI unit of current?

The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 ×1019 when expressed in the unit C, which is equal to A s, where the second is defined in terms of ∆νCs.

What is current formula?

When so defined the current is called conventional current. ... Current is usually denoted by the symbol I. Ohm's law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR. An alternative statement of Ohm's law is I = V/R.

Do you measure current in series or parallel?

An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.

What is the instrument used to measure current?

Ammeter, instrument for measuring either direct or alternating electric current, in amperes.