How do you calculate the shunt required to increase the range N times?

How do you calculate the shunt required to increase the range N times?

Answer: Bcz.. the formula for the shunt resistance to increase it’s range N times (like here it is 4 times) is R/(N-1).

How can increase the range of ammeter?

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

How does a shunt work with an ammeter?

Definition: The ammeter shunt is the device which provides the low resistance path to the flow of current. It connects in parallel with the ammeter. In some of the ammeter, the shunt is inbuilt inside the instrument while in others it is externally connected to the circuit.

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What is the effect of ammeter range on the shunt resistance?

8. What is the effect of the ammeter range on the shunt resistance? It is clear from the above equation that in order to increase the ammeter range by N times, the shunt resistance is equivalent to 1⁄N-1.

How do you calculate shunt required?


  1. In the arrangement as shown in the figure, I and Ig are the current through the circuit and galvanometer respectively. Therefore, the current through shunt S is, Is = (I – Ig)
  2. Since S and G are parallel, the potential difference across them is the same.
  3. If the current I is n times current Ig, then I = n Ig.

How do you increase the range of an ammeter to N times?

To increase the range of an ammeter to n times, the value of shunt reuired is ( G = resistance of galvanometer ) 1. G / n. 2.

Why do we need to extend range of an ammeter?

For example, a moving coil ammeter can measure currents 0-100mA. Thus it is impossible to measure high currents which are more than the measuring range of an instrument. Therefore, it is necessary to bring up these large currents to a value within the range of the instrument.

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Can we increase/decrease the range of an ammeter?

The range of ammeter can be increased but cannot be decreased. The reason is that a series resistor cannot change the current that will produce full deflection.

Why shunt is used?

A shunt is a low-ohm resistor that can be used to measure current. Shunts are always employed when the measured current exceeds the range of the measuring device. The shunt is then connected in parallel to the measuring device.

Does an ammeter need a shunt?

DC ammeters require shunts for their operation. Some meters have built-in shunts, some meters have external shunts. For example, a 50 Amp/50mV meter requires a 50 Amp shunt; a 200 Amp/50mV meter requires a 200 Amp shunt. …

What does shunt mean in electrical terms?

A shunt is an electrical device that generates a low-resistance path for an electrical current. This enables the current to flow to an alternative point in the circuit. Shunts may also be referred to as ammeter shunts or current shunt resistors.

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Which of the following method will be suitable for measurement of resistance of ammeter shunt?

The shunt-type ohmmeter is used for measuring low values of resistance. It operates on the same basic principle as an ammeter shunt.