MCQ
An $NPN$ transistor circuit is arranged as shown in figure. It is
- AA common base amplifier circuit
- ✓A common emitter amplifier circuit
- CA common collector amplifier circuit
- DNone of these
✓
Answer
Correct option: B.
A common emitter amplifier circuit
b
Because emitter $(N)$ is common to both, base $(P)$ and collector $(N)$
Because emitter $(N)$ is common to both, base $(P)$ and collector $(N)$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Gravitational potential difference between surface of a planet and a point situated at a height of $20\,m$ above its surface is $2\,joule/kg$. If gravitational field is uniform, then the work done in taking a $5\,kg$ body of height $4\,meter$ above surface will be ........ $J$
→A projectile is projected with speed $u$ at an angle $\theta$ with the horizontal. The average velocity of the projectile between the instants it crosses the same level is ............
→$Assertion :$ The ratio of $\frac{C_p}{C_v}$ for an ideal diatomic gas is less than that for an ideal monoatomic gas (where $C_p$ and $C_v$ have usual meaning).
$Reason :$ The atoms of a monoatomic gas have less degrees of freedom as compared to molecules of the diatomic gas.
→$Reason :$ The atoms of a monoatomic gas have less degrees of freedom as compared to molecules of the diatomic gas.
From the adjacent figure, the correct observation is
$STATEMENT-1$ For practical purposes, the earth is used as a reference at zero potential in electrical circuits.and
→$STATEMENT-2$ The electrical potential of a sphere of radius $R$ with charge $\mathrm{Q}$ uniformly distributed on the surface is given by $\frac{\mathrm{Q}}{4 \pi \varepsilon_0 R}$.
A point object of mass $m$ is kept at $(a, 0)$ along $x$-axis. What mass should be kept at $(-3 a, 0)$, so that centre of mass lies at origin?
→A moving coil galvanometer has $100$ turns and each turn has an area of $2.0 \mathrm{~cm}^2$. The magnetic field produced by the magnet is $0.01 \mathrm{~T}$ and the deflection in the coil is $0.05$ radian when a current of $10 \mathrm{~mA}$ is passed through it. The torsional constant of the suspension wire is $\mathrm{x} \times 10^{-5} \mathrm{~N}-\mathrm{m} / \mathrm{rad}$. The value of $\mathrm{x}$ is____.
→As the temperature of a conductor increases, its resistivity and conductivity change. The ratio of resistivity to conductivity
A kettle with $2\, littre$ water at $27\,^oC$ is heated by operating coil heater of power $1\, kW$. The heat is lost to the atmosphere at constant rate $160\, J/sec$, when its lid is open. In how much time will water heated to $77\,^oC$. (specific heat of water $= 4.2\, kJ/kg$) with the lid open ?
→Assertion : The binding energy per nucleon, for nuclei with atomic mass number $A > 100$, decreases with $A$.
→Reason : The nuclear forces are weak for heavier nuclei.