How does the resistivity of alloys compare with those of pure metals from which they may have been formed?

Two electric bulbs $A$ and $B$ are marked $220\, V, 60\, W$ and $220\, V, 100\, W$ respectively. Which one of the two has greater resistance?

An electric kettle consumes $1\, kW$ of electric power when operated at $220\, V$. $A$ fuse wire of what rating (in $A$) must be used for it?

Find out the following in the electric circuit given in the figure:
$(a)$ Effective resistance of two $8\,\Omega$ resistors in the combination.
$(b)$ Current flowing through the $4\,\Omega$ resistor.
$(c)$ Potential difference across the $4\,\Omega$ resistor.
$(d)$ Power dissipated in the $4\,\Omega$ resistor.
$(e)$ Difference in ammeter readings,if any.

Write the $SI$ unit of resistivity.

What type of electric charge does an electron possess?