In an AC to DC rectifier circuit, the output DC signal of the
rectified wave was measured to be
VDC= (6.6±0.6)V and its ripple voltage was measured to
be Vripple=(0.27±0.02) mV. What is the uncertainty on
the quality factor of the rectifier?
Three point charges have equal magnitudes, two being positive
and one negative. These charges are fixed to the corners of an
equilateral triangle, as the drawing shows. The magnitude of each
of the charges is 3.5 μC, and the lengths of the sides of the
triangle are 2.0 cm. Calculate the magnitude of the net force that
each charge experiences.
For the following scores,
x
y
0
4
2
9
1
6
1
9
a. Draw a scatter plot. Is this a positive or negative correlation? Explain what a positive correlation and negative correlation are. b.Compute the pearson correlation.
-Draw Separately excited Dc Generator
-Draw the graph for external Characteristic for a DC
Generator.
-Draw the Shunt Generator.
-Draw the Series Generator.
-Draw the Compound Generator.
-Draw the power flow Diagram for all of the circuit mentioned
above.
-Draw the Torque Speed of the Shurt Motors.
-Explain the Back EMF?
-Series Motor why the field is in series with the
winding?
-why should Dc Motor, should never be started at its rated
voltage?
-Explain the principle of a PM...
Two point charges are fixed in place. The positive charge is +2q
and the negative charge is –q. On the line that passes through the
charges, how many places are there at which the total potential is
zero?
Which statement best describes ionic bonding in lithium
fluoride?
A) The positive and negative charges of the ions cancel out.
B) A lithium atom shares on electron with a fluorine atom/
C) An electron is transferred from a lithium atom to a fluorine
atom.
D) An electrostatic attraction exists between lithium ions and
fluoride ions.
You are to compare and contrast a DC and an AC motor.
Make a table with 2 columns: one for DC and one for AC and explain
each of the following
1; What are their parts and what are their functions
2. How do they work (the physics behind it)
3. What are they used for, give some examples
4. Make sure to include schematics, drawings, graphs
1. Describe and/or draw in detail the gram positive and the gram
negative bacterial envelope. Then go on to describe all the steps
of a gram stain. Conclude by explaining why the gram stain is such
an important technique in the microbiology lab.