I11 - Diodes and transistors 2

A junction transistor has 3 pins called:
1. Emitter, anode and cathode
2. Emitter, Collector and Base
3. Anode, cathode and drain
4. Emitter, Collector and gate
In a transistor:
1. the current passing from Emitter to Collector controls the base current
2. the current flowing from base to collector controls the emitter current
3. the current flowing from base to emitter controls the collector current
4. the current passing base to emitter controls the Collector current
The current gain of a transistor is given the greek letter
1. alpha
2. beta
3. gamma
4. delta
To work correctly a transistor has to be set up with the correct voltage and current on the 3 pins. This is called:
1. Voltage control
2. Emitter biasing
3. Correct biasing
4. Current control
A transistor can be used as a switch when:
1. the base-emitter current is enoughcause current to flow through the collector
2. The base voltage is set so as to prevent the flow of electrons in the collector
3. Their is no base current
4. It is large enough to short out the pins
Which is the best description of a transistor circuit designed to produce a continuous sine wave?
1. An amplifier
2. A pulse generator
3. An oscillator
4. An impedance matching circuit
A variable frequency oscillator can be converted to a crytal controlled oscillator by:
1. Adding a crystal in series with the inductor
2. Adding a crystal in parallel with the inductor
3. Replacing the capacitors with a varicap diode
4. Replacing the inductor with a crystal