The amount of charge passing through a cell in $4 \, s$ is $12 \, C$. Find the current supplied by the cell. (in $, A$)

$A$ large number of free electrons are present in metals,yet no current flows in the absence of electric potential across it. Explain the statement with reason.

What is the resistance of an ideal voltmeter?

$A$ nichrome wire has a resistance of $10\, \Omega$. Find the resistance of another nichrome wire,whose length is three times and area of cross-section four times the first wire.

What is the maximum resistance which can be made using five resistors each of $1/5 \ \Omega$ (in $Omega$)?

In a Voltaic cell,what is the direction of the flow of electrons in the external circuit?