List of top Physics Questions on Current electricity asked in MET

The length of a potentiometer wire is \(l\). A cell of emf \(E\) is balanced at length \(l/3\) from the positive end of the wire. If the length of the wire is increased by \(l/2\), then at what distance will the same cell give a balance point?

Under what conditions current passing through the resistance \(R\) can be increased by short circuiting the battery of emf \(E_2\)? The internal resistances of the two batteries are \(r_1\) and \(r_2\) respectively.

We have a galvanometer of resistance \(25\Omega\). It is shunted by \(2.5\Omega\) wire. The part of the total current that flows through the galvanometer is given as

Given \(R_1=1\Omega,\ R_2=2\Omega,\ C_1=2\mu F,\ C_2=4\mu F\). Find time constants for circuits I, II, III.

In the electrical network shown in the figure, the potential difference across 3 $Ω$ resistance will be