How can a galvanometer be converted to voltmeter?

How can a galvanometer be converted to voltmeter?

A galvanometer can be converted into a voltmeter by connecting a large resistance in series to the galvanometer which is shown in diagram. Resistance of an ideal voltmeter is infinite. A voltmeter is always connected in parallel to the circuit component across which voltage is to be measured.

Can we use galvanometer to measure voltage?

A galvanometer can be made into a voltmeter to measure voltage by connecting a high resistance in series. Once the galvanometer is converted into a voltmeter it should be connected parallel to the circuit just like a voltmeter.

How can we convert galvanometer into voltmeter and ammeter?

Conversion of galvanometer into ammeter and voltmeter

1. A galvanometer is very sensitive instrument to detect the current.
2. Ammeter is an instrument used to measure current flowing in the electrical circuit.
3. A galvanometer is converted into an ammeter by connecting a low resistance in parallel with the 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 is ideal voltmeter?

Hint: An ideal voltmeter is one which has infinite resistance. When the resistance is infinite, the voltmeter draws no current and hence, gives accurate readings of voltage. A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit.

What is used to measure voltage?

Voltmeter, instrument that measures voltages of either direct or alternating electric current on a scale usually graduated in volts, millivolts (0.001 volt), or kilovolts (1,000 volts). The potentiometer operates by comparing the voltage to be measured with known voltage; it is used to measure very low voltages.

Does a galvanometer measure current or voltage?

A galvanometer is a device that measures electrical current. It consists of a solid iron mass wrapped in copper wire with a needle attached to it, and placed between opposite ends of two magnets.

Can we convert a galvanometer into an ammeter?

A galvanometer can detect only small currents. Thus, to measure large currents it is converted into an ammeter. It can be converted into an ammeter by connecting a low resistance called shunt resistance in parallel to the galvanometer. When an electric current passes through the coil, it deflects.

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.

Can you convert voltmeter into ammeter?

The first step to convert a voltmeter to an ammeter is to determine the resistance Rm of the voltmeter. Make the circuit connections as shown in Fig 2(a). 2. Keeping R = 0, adjust the supply voltage E so that the voltmeter shows large readings Vm.

What is the example of ideal voltmeter?

Hint: An ideal voltmeter is one which has infinite resistance. When the resistance is infinite, the voltmeter draws no current and hence, gives accurate readings of voltage. And the internal resistance of an ideal ammeter is zero.

Why is ideal voltmeter infinite resistance?

A voltmeter is used to measure the potential difference across the two points of a circuit. For it, the voltmeter is connected in parallel across those two point. The potential difference measured by voltmeter will be accurate if no current is drawn by voltmeter. Thus, ideal voltmeter has infinite resistance.

How to convert a galvanometer into a voltmeter?

Aim : To convert the given galvanometer into a voltmeter of desired range and to verify the same . Apparatus : A Weston type galvanometer , a voltmeter of 0-3 V range , a battery eliminator , two resistance boxes , the one way key , a rheostat , connecting wires .

How to adjust the deflection of a galvanometer?

Take out the plugs of calculated resistance R from the resistance box. By using a key adjust the movable contact of the rheostat such that the deflection of the galvanometer becomes maximum. Note both the readings of the galvanometer and voltmeter.

How is the correction for a converted voltmeter calculated?

The standard voltmeter reading V is noted. The correction in the converted voltmeter reading, V — V o, is calculated. The experiment is repeated for different values of the converted voltmeter readings. A calibration curve is drawn with the correction V — V o, along the y-axis and V o, along the x-axis.

What kind of apparatus is a galvanometer used for?

Apparatus: An accumulator, pointer type galvanometer of known resistance and figure of merit, a resistance box of range 1 to 10,000 Ω , a high resistance rheostat, a standard millivoltmeter, key etc.