Five bulbs are connected in a parallel circuit. If the second bulb blows out,what happens?

How will you conclude that the same potential difference (voltage) exists across three resistors connected in a parallel arrangement to a battery?

Which of the following is true for a series combination of three resistors?

Electric current flows through three lamps when arranged in $(a)$ a series and $(b)$ a parallel circuit. If the filament of one lamp breaks,explain what happens to the other two lamps in both cases.

$A$ battery of $9 \, V$ is connected in series with resistors of $0.2 \, \Omega$,$0.3 \, \Omega$,$0.4 \, \Omega$,$0.5 \, \Omega$,and $12 \, \Omega$ respectively. How much current (in $A$) would flow through the $12 \, \Omega$ resistor?

Judge the equivalent resistance when the following are connected in parallel: $1 \, \Omega$,$10^3 \, \Omega$,and $10^6 \, \Omega$.