Question

why should the resistance of:
a)an ammeter be very small?
b)a voltmeter be very large?

Answer 1

a)the ideal ammeter has zero internalresistance, so as to drop as little voltage as possible as electrons flow through it. ... So if the resistance o an ammeter is large , the current measured by theammeter is quite less as compared to the actual amount of current flowing through the circuit which is ineligible.

Answer 2

a.) An ammeter is very small because if resistance is small the flow of current will be continuous so that ammeter will give appropriate reading of current.

b.) The resistance of voltmeter is very large than it will oppose current and let to read measure of volts .

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