Question

arrange the following in the increasing order of resistance . milliammeter voltmeter ammeter​

Answer 1

Explanation:

To increase the range of an ammeter a low resistance has to be connected in parallel with galvanometer. Therefore, net resistance decreases,. To increase the range of voltmeter a high resistance has to be connected innseries.So net resistance further increases Therefore the correct order is

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Answer 2

Answer:

The order of resistances $Req(v) > Rreq(G) > Req(A)$ So, the maximum resistance device is voltmeter.

Explanation:

• Out  of galvanometer , ammeter and voltmeter the resistance of ammeter is lowest and resistance of voltmeter highest the actual reason is to measure the current passing through the circuit the
• Ammeter should be connected in series. If it has considerable amount of resistance then the current that it measure will differ from the actual current passing through it. So it must be of low resistance.
• In the case of Voltmeter it is connected parallel to the load. To get the accurate value zero amount of current pass through voltmeter. So it must be of  high resistance.
• therefore the reason behind low and high value of resistances of ammeter and voltmeter is to achieve the best correct reading , not the placement of them in series and parallel.
• Electric circuit diagram of ammeter, galvanometer and voltmeter is shown below,
• Hence, the order of resistances $Req(v) > Rreq(G) > Req(A)$
• ​So, the maximum resistance device is voltmeter.