# What is used for increase the range of voltmeter?

## What is used for increase the range of voltmeter?

To increase the ranges of a voltmeter, we need to connect a high series of multiplier resistance in series with voltmeters. We can extend the range of ammeter by keeping a shunt resistance. As the two resistances, Rm and Rsh are in parallel, the voltage drop across the resistance is equal.

How do you increase voltage range?

To increase the ranges of a voltmeter, we need to connect a high multiplier resistance in series with voltmeters. To increase the ranges of ammeter, we need to connect a small shunt resistance in parallel with ammeters.

Can we change the range of voltmeter?

We can increase the range of the given voltmeter by putting a suitable high resistance in series with the voltmeter.

### What is used to increase the range of an ammeter?

So to increase the range of ammeters we should have to connect low resistance in parallel so that equivalent resistance is lower hence to increase range of an ammeter we need to connect a suitable low resistance in parallel.

How do you increase the range of a voltmeter needed to connect?

The range of the voltmeter can be increased by increasing the resistance. This can be done by connecting a resistor in series with the voltmeter.

Why do we need to extend the range of voltmeter?

Now let us learn about the extension of the measuring range of voltmeters. Due to difficulty in measuring high voltages with normal voltmeters, it is, therefore, necessary to bring those high values to normal values that can be measurable by voltmeters. This process is called the extension of range of voltmeter.

## Why do we need to extend the range of a voltmeter?

Can stabilizer increase voltage?

When less than normal voltage is supplied by the power supply company side, a voltage stabilizer increases the voltage at the output connected to the load. This can be accomplished by a transformer inside the stabilizer.

How can we increase or decrease the range of voltmeter?

The range of voltmeter can be increased by connecting a suitable high resistors in series with it. 2. The range of a voltmeter can decreased by reducing its resistace. This can be done by putting a suitable resistance in parallel with the voltmeter.

### How can you increase the range of ammeter and voltmeter?

The shunts and multipliers are used to extend the range of moving coil ammeters and voltmeters respectively. Whereas in the case of moving iron ammeters, for the ranges up to 0 – 250 A, shunts are used and for the ranges higher than that, CTs are used.

When series resistance is increased range of voltmeter?

To increase the range of voltmeter the series resistance should be increased. Explanation: When we increase the series resistance, the voltmeter’s range expands.

Why do we need to extend the range of a voltmeter What is the relation between the resistance to be connected to extend the range of meter and its internal resistance?

Multipliers: The range of voltmeter can be extended by connecting a high resistance, called multiplier in series with the voltmeter (Figure 2(b)). The multiplier limits the voltage drop so that it does not exceed the value of full scale and thus prevents from being damaged.

## How do you extend the range of a voltmeter?

Range Extension of Voltmeters. Multipliers are used for the range extension of voltmeters. The multiplier is a non-inductive high-value resistance connected in series with the instrument whose range is to be extended. The combination is connected across the circuit whose voltage is to be measured.

What is the resistance of a moving coil voltmeter?

The combination is connected across the circuit whose voltage is to be measured. Example: A moving coil voltmeter reading up to 20 mV has a resistance of 2 ohms. How this instrument can be adopted to read voltage up to 300 volts. Shunts can not be used to extend the range of moving-iron AC ammeters accurately.

How to measure voltage beyond the range of an AC meter?

For ac meters the inductance associated with the multipliers cause error. So it should be non inductively wounded. Another method is to use potential transformer (PT). PT is nothing but a step down transformer. The voltage beyond the range of meter is stepped down to a lower voltage and this low voltage is measured using the voltmeter.

### What is a moving-iron AC voltmeter used for?

For ranges higher than 0 – 750 V, where power wasted in the multiplier would be excessive, a 0 – 110 V moving-iron AC voltmeter is used in conjunction with a potential transformer as shown in the figure. The potential transformer is a step-down transformer i.e. number of primary turns is more than the secondary turns.