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Physics II Lab w answers_Part_12

Physics II Lab w answers_Part_12 - on TV field or TV line...

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35 C. Horizontal Deflection Subsystem Sweep Time (Time/dir): Controls the sweep time for the spot to move horizontally across one division of the screen when the triggered sweep mode is used. Var (Time/div): Vernier control for continuous change of sweep time. Trigger: Selects the source of the trigger signal, which produces the sweep waveform. Internal Trigger: The output of the vertical amplifier is used to trigger the sweep waveform. External Trigger: An external signal must be applied to the X inputs to trigger the sweep waveform. Sweep Magnifier: Decreases the time per division of the sweep waveform. Trigger Level : Selects amplitude point on trigger signal that causes sweep to start. Trigger Mod: AUTO provides normal triggering and provides baseline in absence of trigger signal. NORM permits normal triggering but no sweep in absence of triggering. TV provides triggering
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Unformatted text preview: on TV field or TV line . References: 1. “Student Reference Manual for Electronic Instrumentation”, S.E.Wolf and R.F.M.Smith, PHI, New Delhi, 1990. 2. “Basic Electronic Instrument Handbook”, C.F.Coombs, Mc Graw Hill Book Co., 1972. 36 Observations and Results PART A 1. Room Temperature = _________________________ C 2. Frequency of Audio signal = _________________________ 3. Time/div scale setting = _________________________ 4. Calculated frequency from CRO screen = _________________ Table 1 : Position of Nodes Position of microphone at nodes(cm) Frequency Distance between successive nodes for the following frequencies(in cm) S.No f 1 =______kHz f 2 =_____kHz f 3 =_____kHz f 1 =______kHz f 1 =______kHz f 1 =______kHz 1 2 3 4 5 Calculations: f 1 = ____ kHz f 2 = _____kHz f 3 = _______kHz Average & /2 (cm) Average & (cm) Velocity of Sound , v = f &...
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