In the second section, we were instructed to determine the internal resistance of the voltmeter. Two dc circuit were constructed as FIG 1. and FIG 2. using a resistor with an expected resistance at 820000W*41000W. In the third section, we were asked to judge if the filament of a light bulb obey Ohm's law, this was done by constructing a dc circuit as FIG 1. with a light bulb instead of a resistor.
The current that is leaving the AC voltage source which is equivalent to the current that is through resistor 1. The current of the inductor and capacitor are both leaving the AC voltage source. You can find the... ... middle of paper ... ...quency and the inductor, V˪=IwL. The inductive reactance is found by multiplying the angular frequency by the inductor (X˪=wL). The amplitude of voltage across the inductor in an AC circuit is the current multiplied by the inductive reactance (V˪=IX˪).
Inversion is the change of dc power to ac power at a desired output voltage or current and frequency. A static semiconductor inverter circuit does this electrical energy inverting transformation. The terms voltage-fed and current-fed are used in relation with the output from inverter circuits. Conventionally, inverters are classified into two broad categories – voltage source inverter (VSI) and current source inverter (CSI). A VSI is one in which the dc input voltage would have to keep constant and independent of the load current drawn.
You must be careful to specify which voltage you mean. The oscilloscope is primarily a voltage-measuring device. Once you have measured the voltage, other quantities are just a calculation away. You take voltage measurements by counting the number of divisions a waveform spans on the oscilloscope's vertical scale. Adjusting the signal to cover most of the screen vertically, then taking the measurement along the centre vertical graticule line having the smaller divisions makes for the best voltage measurements.
4) Measure resistance with the ohmmeter. 5) Determine the accuracy of a given meter reading. Theory The theory required for this experiment was an understanding of Ohm’s Law. Ohm’s Law is the algebraic relationship between voltage and current for a resistor. Resistance is the capacity of materials to impede the flow of current or electric charge.
Motors and sensitive electronics will need inverters that are able to produce almost perfect sinusoidal voltage and current waveforms in order to operate correctly. These tend to be more expensive and difficult to design. The designer should choose inverters according to load types and power requirements. In the photovoltaic industry, inverters can be classified into two broad categories: 1) Stand-Alone Inverters These inverters are meant to operate isolated from the electrical distribution network (off-grid) and require batteries for proper operation. The batteries provide a constant voltage source at the DC input of the inverter.
Multilevel Diode Clamped/Neutral Point Inverter Multilevel inverter (MLI) cascade inverter (cascaded inverters will be presented in a later chapter) with diodes blocking the source. This inverter was later derived into the Diode Clamped Multilevel Inverter; also called Neutral-Point Clamped Inverter (NPC) the NPCMLI topology the use of voltage clamping diodes is essential. A common DC-bus is divided by an even number, depending on the number of voltage levels in the inverter, of bulk capacitors in series with a neutral point in the middle of the line. ii. Multilevel Capacitor Clamped/Flying Capacitor Inverter, CCMLI iii.
The voltmeter is connected in parallel with the wire. Voltmeters have a high resistance, so the current they take is usually negligible. We decided on the variables that could affect the resistance of a wire:  Length of the wire  Thickness of the wire  The material used as the wire  Temperature We were to investigate as many of these factors as possible given a limited period of time. We would carry out a set of experiments where in each one we changed one variable while keeping the others constant. In each case we would have to measure the current passing through the circuit and the potential difference across the wire; given these the resistance could be calculated using the formula R=v/i, where R is the resistance in Ohms, v is the potential difference in Volts, and i is the current in Amperes.
It can also adjust the offset to zero out quiescent loads. On the other hand, some strain-gauge signal conditioners support adjustments of fixed gain, offset, and excitation. Figure 2: Instrumentation Amplifier circuit From the equation given as, V_out/(V_2-V_1 )=( 1+ 〖2R〗_1/R_gain ) R_3/R_2 With this circuit is represented construct out of the accurate amplification of the difference between two voltages with three resistors linking a third op Amp. Consider all resistors to be of equal value except for... ... middle of paper ... ...e by the use of a multiplexer. The six analog signals from the strain gauges are associated into one signal by the help of a multiplexer.
large conduction losses. A resonant inductor is placed in the switched capacitor circuits to limit the peak current and avoid the diode reverse-recovery problem [11, 12]. The small inductor makes the active switch turn on with zero-current switching (ZCS) condition in . When the conversion ratio is large, many switched capacitor stages are required to achieve high voltage gain, which makes the circuit complex and increases the cost. Additional inductors and diodes are placed to extend the voltage gain of the converters, where the inductors are connected in parallel to the charging path and then connected in series to the discharging path [13, 14].