What is the resistance of an ideal voltmeter?

What are the factors on which the resistance of a conductor depends?

An electric heater rated $600 \ W$ operates $6$ hours per day. Find the cost to operate it for $30$ days at ₹ $3.00$ per unit.

What is the minimum resistance which can be made using five resistors each of $1/5\,\Omega$?

Out of the two wires $X$ and $Y$ shown below,which one has greater resistance? Justify your answer.

$A$ wire of resistance $10 \, \Omega$ is bent in the form of a closed circle. What is the effective resistance between the two points at the ends of any diameter of this circle?