In a Voltaic cell,what is the positive electrode (cathode) made of?

Which symbol is used for the resistivity of a conductor?

$1 \, \mu A = \ldots \ldots \ldots \, A$

Which device works on the heating effect of electric current?

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

When three resistors of $5 \Omega$,$10 \Omega$,and $30 \Omega$ are connected in parallel in a circuit,what will be the equivalent resistance?