In the symbol of a transistor,the arrow indicates the direction of:

In a $CE$ transistor amplifier,there is a current and voltage gain associated with the circuit. In other words,there is a power gain. Considering power as a measure of energy,does the circuit violate the law of conservation of energy?

Consider the circuit arrangement shown in figure $(1)$ for studying input and output characteristics of an $n-p-n$ transistor in $CE$ configuration. Select the values of $R_B$ and $R_C$ for a transistor whose $V_{BE} = 0.7 \, V$, so that the transistor is operating at point $Q$ as shown in the characteristics shown in figure $(2)$. Given that the input impedance of the transistor is very small and $V_{CC} = V_{BB} = 16 \, V$, also find the voltage gain and power gain of the circuit making appropriate assumptions.

The part of a transistor which is heavily doped to produce a large number of majority carriers is

In a $p-n-p$ transistor,

For a common-emitter transistor amplifier, the current gain is $60$. If the emitter current is $6.6 \,mA$, then its base current is (in $\,mA$)