Ten questions. The result tells you which lessons you may skip.
A cell of emf \(6\,\text{V}\) and internal resistance \(1\,\Omega\) drives \(2\,\text{A}\) through a load. Its terminal voltage is
A charger forces \(2\,\text{A}\) into the positive terminal of a battery of emf \(12\,\text{V}\) and internal resistance \(0.5\,\Omega\). The terminal voltage is
A cell of emf \(\mathcal E\) and internal resistance \(r\) delivers the largest power to a load \(R\) when
Six equal cells, each of emf \(\mathcal E\) and internal resistance \(r\), are joined in series with one of them reversed. The combination has
Four equal cells of \(2\,\text{V}\) and \(1\,\Omega\) are joined in parallel. The combination has
A Wheatstone bridge has \(P = 2\,\Omega\), \(Q = 3\,\Omega\) and \(R = 4\,\Omega\). It is balanced when \(S\) is
In a meter bridge, \(X\) in the left gap balances a known \(6\,\Omega\) at \(40\,\text{cm}\) from the left end. \(X\) is
In a post office box with \(P = 1000\,\Omega\) and \(Q = 10\,\Omega\), the null is at \(R = 2734\,\Omega\). The unknown is
A potentiometer wire \(4\,\text{m}\) long has \(2\,\text{V}\) across it. A cell balances at \(2.4\,\text{m}\). Its emf is
A galvanometer of \(100\,\Omega\) reads full scale at \(1\,\text{mA}\). To make it a voltmeter of range \(10\,\text{V}\), one joins