Question

Consider the following circuit :

What would be the readings of the ammeter and the voltmeter when key is closed ?

Give reason to justify your answers.

OR

What is electrical resistivity ? Derive its SI unit. In a series electrical circuit

comprising a resistor made up of a metallic wire, the ammeter reads 100 mA. If the

length of the wire is doubled, how will the current in the circuit change ? Justify your

answer.

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Answer 1

Answer:

The ammeter reads the flow of current passes through the circuit.its works like Galvanometer..

The voltmeter reads the flow of voltage given by battery through circuit

or

Voltmeter measures voltage between two points...

Explanation: