CHAPTER CHECKLIST CONCEPTS: Conduction in semiconductors (the distinction between intrinsic and extrinsic conduction) p-type and n-type semiconductors
Semiconductor diodes (the basic principles underlying current flow across a p–n junction) Resistance in semiconductors (LDR—light-dependent resistor, thermistor) Effect of temperature on semiconductors
MANDATORY EXPERIMENTS:
23. Investigation of the variation of the resistance of a thermistor with temperature 24. Investigation of the variation of current (I) with voltage (V) for a (d) semiconductor diode
ACTIVITIES: Demonstration of current flow across a p–n junction in forward and reverse bias Demonstration of an LDR Demonstration of a thermistor
SCIENCE,TECHNOLOGY & SOCIETY: Electronic devices (rectification, LEDs, integrated circuits) Uses of LDRs Uses of thermistors
