Resistance Of Ideal Ammeter. We will find the shunt as part of the ammeter circuit. In practice, analog ammeter working is based on deflection of a coil (and attached pointer) in relation to current being measured.
5.2 Ammeters, Voltmeters & Potential Dividers
This parallel resistance is called shunt. However, in reality there will be a very small internal resistance associated with an ammeter. So our correct answer is, option d, zero. Web however, unlike the ideal voltmeter, the ideal ammeter has zero internal resistance, so as to drop as little voltage as possible as current flows through it. Web the ideal ammeter will have zero resistance so as not to disturb the circuit. And which in turn reduces the current and hence we face error in the current. As i understand, ideally an ammeter will have zero resistance as it is connected in series with the circuit and so there will be no potential difference across the device. Web an ammeter is used to measure the current in a circuit. The coil, made of conductor wire, has certain resistance, however low. The ammeter and voltmeter readings are medium view solution > assertion
So our correct answer is, option d, zero. And which in turn reduces the current and hence we face error in the current. But ammeters have very low resistances which causes very low error and which can be negligible. Web however, unlike the ideal voltmeter, the ideal ammeter has zero internal resistance, so as to drop as little voltage as possible as current flows through it. Web resistance of an ideal ammeter is zero because ammeter is connected in series to measure the current to ensure that there must not be any volatage drop because of the internal resistance of ammeter it is ideally taken as zero. This parallel resistance is called shunt. With voltmeters, we want as little current to be drawn as possible from the circuit under test. The shunt is nothing more than a resistor with a very low resistance. Note that this ideal resistance value is exactly opposite as that of a voltmeter. Web ammeter is a device that is applied in series to the circuit through which we want to calculate the current. We will find the shunt as part of the ammeter circuit.
