The position of the pointer of two ammeter A1 and A2,and two Voltmeter V1 and V2
available in the laboratory are shown in the given figure .For an experiment to study the dependence of the current on the potential difference across a resistor ,the student would prefer
a)ammeter A1 and voltmeter V1
b)ammeter A2 and voltmeter V1
c)ammeter A1 and voltmeter V2
d)ammeter A2 and Voltmeter V2
Answers
Option b
We should select instruments without Any error
correct position should be at zero
Hence the correct answer is A2 and V1
their needle is in right position 0
Answer:
Given below is the answer
Explanation:
We should choose instruments carefully.
the proper place should be at zero
The right response is therefore A2 and V1.
Their needle is at the proper place. 0
An ammeter is a device used to measure electric current in amperes, either in direct current (DC) or alternating current (AC). Because only a tiny fraction of the current is sent via the metre mechanism at high values and the majority is carried by a shunt in parallel with the metre, an ammeter can measure a wide range of current values. An ammeter is represented by a circle with a capital A inside it in circuit diagrams.
Accuracy and working principles of ammeters differ. With accuracy ranging from 0.1 to 2.0 percent, the D'Arsonval-movement ammeter monitors direct current flowing through a coil hanging between the poles of a magnet. A moving coil revolving in the field created by a fixed coil is how the electrodynamic ammeter works. Both direct and alternating current are measured (using Accuracy of 0.1 to 0.25 percent is achieved using a rectifier to convert AC to DC. The measured current heats a piece of wire, and the measured current is indicated by how much the wire expands, in the thermal (or hot-wire) ammeter, which is generally used to measure AC with accuracies of 0.5 to 3 percent. A circuit like the dual slope integrator is used by digital ammeters, which have no moving parts, to translate an analogue (continuous) current into its digital equivalent. Accuracy of many digital ammeters is better than 0.1 percent.
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