Absence of one electron, creates the positive charge of magnitude equal to that of electronic charge.
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Plate resistance of two triode valves is $2 k \Omega$ and $4 k \Omega$, amplification factor of each of the valves is $40.$ The ratio of voltage amplification, when used with $4 k \Omega$ load resistance, will be
The amplification factor of a triode is $18$ and its plate resistance is $8 \times 10 \Omega$. A load resistance of $10 \Omega$ is connected in the plate circuit. The voltage gain will be