Ten questions. The result tells you which lessons you may skip.
In a crystal of \(N\) identical atoms, one energy level of a single atom becomes
The band gap of diamond is \(5.4\,\text{eV}\). Take \(hc = 1240\,\text{eV nm}\). The longest wavelength that diamond can absorb by lifting an electron across its gap is about
A piece of pure silicon and a copper wire are both warmed from 300 K to 330 K. Their resistances
In an electric field, the holes in a semiconductor move
Silicon doped with arsenic, which has five valence electrons, is
Silicon at 300 K, with \(n_i = 1.5 \times 10^{16}\,\text{m}^{-3}\), is doped with \(10^{22}\) donors per cubic metre. The concentration of holes is about
The electric field inside the depletion layer of an unbiased p-n junction points
A silicon diode is reverse biased. Which statement is correct?
A silicon diode, a \(470\,\Omega\) resistor and a \(5\,\text{V}\) battery are in series, with the diode forward biased. With the 0.7 V model, the current is about
A bridge rectifier is fed from the \(50\,\text{Hz}\) mains. The output pulses repeat