Question 3.
- Fig. 3 is a graph of voltage against current.
State the:
- Physical quantity defined by the slope of the graph;
- Condition under which a material will behave as shown in Fig. 3;
- Type of material that behaves as shown in Fig. 3.
- Fig. 4 is a structural diagram of a transistor
Draw and label the:
- Circuit symbol for the transistor;
- Transistor in common emitter configuration.
Observation
The expected answers were:
(a) (i) Resistance
(ii) Constant temperature/pressure
(iii) Metals/conductors
(b) (i) Circuit symbol of the transistor
(ii) Transistor biased in common emitter configuration
(c) Applications of a transistor
- Switching circuits
- Multivibrators
- Oscillators
- Amplifier circuits
- Voltage regulator
- Inverter