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Different voltages are applied across a $P-N$ junction and the currents are measured for each value. Which of the following graphs is obtained between voltage and current
The width of forbidden gap in silicon crystal is $1.1\ eV$. When the crystal is converted in to a $N$-type semiconductor the distance of Fermi level from conduction band is
The transfer ratio of a transistor is $50.$ The input resistance of the transistor when used in the common-emitter configuration is $1 k \Omega$. The peak value for an A.C input voltage of $0.01 V$ peak is