NEET 2017 Question Paper - Code A Mock Test

In a common emitter transistor amplifier the audio signal voltage across the collector is $3\text{V}$. The resistance of collector is $3\text{k}\Omega$. If current gain is $100$ and the base resistance is $2\text{k}\Omega$, the voltage and power gain of the amplifier is:

Which one of the following represents forward bias diode?

A spring of force constant $k$ is cut into lengths of ratio $1:2:3$. They are connected in series and the new force constant is $k^{\prime }$. Then they are connected in parallel and force constant is $k^{\prime \prime }$. Then $k^{\prime }:k^{\prime \prime }$ is:

The given electrical network is equivalent to:

The acceleration due to gravity at a height $1\text{km}$ above the earth is the same as at a depth $d$ below the surface of earth. Then: