1. We connect the apparatus as shown in Figure 3, without making the connection between the diode and the transformer yet.
2. Connect the diode to the 12.SVolt tap on the transformer and plug the transformer in. We measure the peak voltage of the waveform with the oscilloscope and record this value below... displayed 300 characters
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Measure the DC voltage with the Multimeter and record this value below.
3. Unplug the transformer and connect the diode to the 25.OVolt tap and once again measure and record the peak voltage and the dc voltage as before. The values are recorded on the Lab Report Sheet.
PART III - PHASE ANGLE MEASUREMENT
The resistor voltage varies directly with the current and is used to represent the current
VR = R x i
1... displayed next 300 characters
When testing the transistor, an npn transistor is used. The linear relation between output current and current source is proved, and their ratio ?, which is the common-emitter current gain can also be measured...
In other words
Resistance is directly proportional to length.
This is because the longer the copper wire the longer it takes for electrons to travel to the end, making the resistance of the wire longer...
All input voltage appears across the diode itself. Hence we conclude that when the input voltage is going through its positive half cycle, output voltage is almost the same as the input voltage and during the negative half cycle no voltage is available across the load...
The electrode holders must withstand thermal cycling (not so much for our furnace, since our furnace should have a continuous feed) and severe mechanical loading and wear due to vibrations, torsion forces and such...
The Half Wave Rectifier (Schematic 1) experiment showed that an output is only produced at R1 during the positive half cycles of the input sinusoid. This is due to the fact that the diode is inactivated, or "off" during the negative half cycles of the input...
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