Question

8. Small current can be measured by
a) Millimeter
b) Ammeter​

Answer 1

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Option (b) Ammeter is the correct answer!

An ammeter usually has low resistance so that it does not cause a significant voltage drop in the circuit being measured. Instruments used to measure smaller currents, in the milliampere or microampere range, are designated as milliammeters or microammeters.

Small currents can also be measured by current integration. Two methods are used for collecting charges on a known capacitor and measuring the voltage. The first uses an electrometer as a voltmeter with a capacitor shunting the input. The second incorporates the capacitor into the feedback of the electrometer.

Answer 2

Option ' b ' Ammeter

Ammeters work to measure electrical current by measuring the current through a set of coils with a very low resistance and inductive reactance. ... If the ammeter were connected in parallel, the path may become short-circuited such that all the current will flow through the ammeter instead of the circuit.

I hope it helps you....

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