MODEL QUESTIONS (IPE PATTERN)

Write the expression for the efficiency of a full-wave rectifier and a half-wave rectifier.

A full wave p-n junction rectifier uses a load resistance of $1300 \mathrm{\Omega }$. The internal resistance of each diode is $9 \mathrm{\Omega }$. Find the efficiency of this full wave rectifier.

Calulate the current amplification factor $\beta$ (beta) when change in collector current is $1 \mathrm{mA}$ and change in base current is $20 \mathrm{\mu A}$.

For a transistor amplifier, the collector load resistance $R_L=2 \mathrm{k\Omega }$ and the input resistance $R_i=1 \mathrm{k\Omega }$. If the current gain is $50$, calculate the voltage gain of the amplifier.

For transistor action, which of the following statements are correct:

For a transistor amplifier, the voltage gain

For a CE-transistor amplifier, the audio signal voltage across the collector resistance of $2 \mathrm{k\Omega } is 2 \mathrm{V}.$ Suppose the current amplification factor of the transistor is $100,$ find the input signal voltage and base current, if the base resistance is $1 \mathrm{k\Omega }.$

Two amplifiers are connected one after the another in series. The first amplifier has a voltage gain of $10$ and the second has a voltage gain of $20$. If the input signal is $0.01 \mathrm{V}$. Calculate the output $\mathrm{AC}$ signal.