In common emitter mode of a transistor, the current gain is 8 . The input impedance is $25 \mathrm{k} \Omega$ and load resistance is $75 \mathrm{k} \Omega$. The power gain is

If the internal resistance of cell is negligible then current flowing through the circuit is

Which of the following logic gates is called as Universal gate?

Which graph shows correctly the temperature (T). dependence of resistivity $(\rho)$ of a semiconductor?