H Experiments - Unit 2 - Electricity and Electronics

Click on Activity Below	Title	Aim of Experiment
Activity 01	Electric Field patterns	To investigate the electric field patterns around two point charges and two parallel plates.
Activity 02	The Cathode Ray Tube	To investigate the path of the electron beam in a cathode ray tube.
Activity 03	e.m.f. and internal resistance with parallel circuits	To determine the internal resistance of a battery
Activity 04	Internal resistance of a cell	To determine the internal resistance of a cell.
Activity 05	The balanced Wheatstone Bridge	To find the resistances of unknown resistors.
Activity 06	The out-of-balance Wheatstone bridge	To investigate the relationship between the current through the limiting resistor and the change in resistance of one of the resistors in the Wheatstone Bridge.
Activity 07	The out-of-balance Wheatstone bridge – applications	To investigate several applications of the Wheatstone bridge in the out-of-balance condition.
Activity 08	Alternating current – peak and r.m.s.values	To establish a relationship between peak and equivalent direct (r.m.s.) values of voltage.
Activity 09	Calibration of a signal generator.	To measure the output frequency of a signal generator using an oscilloscope.
Activity 10	Charge and potential difference for a capacitor	To investigate the relationship between the voltage across a capacitor and the charge stored on its plates.
Activity 11	Charging and discharging characteristics for a capacitor	To observe the variation of the current through, and the p.d. across the capacitor during the charge and discharge cycles.
Activity 12	Response of resistance in a variable frequency a.c.circuit.	To establish a relationship between the current through a resistor and the frequency of the a.c. supply.
Activity 13	Current and frequency in a capacitive circuit.	To establish a relationship between the current in a capacitive circuit and the frequency of the a.c. supply.
Activity 14	Uses of capacitors – a flashing neon lamp.	To show the principle of operation of a flashing neon lamp.
Activity 15	Uses of capacitors – d.c. power supply.	To show the effect of capacitors in the production of a smooth d.c. supply from an a.c. supply.
Activity 16	Using a potentiometer	To use a potentiometer to select a range of voltages
Activity 17	The Inverting Amplifier	To investigate the Op-Amp in the inverting mode
Activity 18	Saturation	To investigate the saturation voltage of the Op-Amp
Activity 19	Square wave generator	To investigate how the Op-Amp can be used to produce square waves.
Activity 20	The differential amplifier	To investigate the Op-Amp operating in the differential mode
Activity 21	The inverting amplifier used to control heavier loads.	To show how the Op-Amp can be used in a circuit to switch on a high current device.
Activity 22	The differential amplifier used to monitor light level.	To investigate the use of a differential amplifier with a Wheatstone Bridge to monitor light level.