By J.N. Gurtu, Amit Gurtu.
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Volt Result: The value of voltage by voltmeter (VI) The value of voltage by CRO 29 ELECTRONICS Error = VI - V2 Precautions: (i) All the connections should tight. (ii) For an accurate result readings should be taken carefully. (iii) Switch off after taking the readings. EXPERIMENT No. 3 Object: 7b become familiar with CRO. Theory : Out of all the equipmentslinstruments available in laboratory, perhaps the most important and versatile is the cathode ray oscilloscope (CRO). It is primarily used for the display of wave-forms.
3) Reading in voltmeter will increase while reading in milliammeter will decrease. (4) Record the reading of voltmeter and milliammeter after every 2 seconds till you get the maximum voltage and minimum current. d c. slippl! lF C Fig. 8. (5) Repeat the same process by changing Rand C. (b) For discharging of capacitor (1) Make a circuit diagram as shown in fig. (8). (2) Keep switches 8 1 and 8 2 open while switch 8 3 be closed. (3) Close 8 1 till reading in voltmeter reaches maximum value. (4) Then open and close 8 2 (8 3 is already closed).
Q .. No. P Q R Deflection in galvanometer 1. 2. 3. 4. 5. Null deflection l S 32 ADVANCED PHYSICAL CHEMISTRY EXPERIMENTS Result: The value of 8 for different values of P, Q and R will be given by, 8=R. ~Q After that check the resistance of 8 by multimeter and find the error. Precautions: (i) The values of resistances P, Q and R should be well known. (ii) The accurate value of resistance of the cell is also known. (iii) The galvanometer should be of high quality. (iv) All the wires should be tightly connected.
Advanced physical chemistry experiments by J.N. Gurtu, Amit Gurtu.