Though the electron drift velocity is small and electron charge is very small, a conductor can carry an appreciably large current because

Masses of three wires of copper are in the ratio $$1: 3: 5$$ and their lengths are in the ratio $$5: 3: 1$$. The ratio of their electrical resistance are

In the given circuit, the current through 2$$\Omega$$ resistor is

Kirchhoff 's junction rule is a reflection of