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Figure 5.44 represents two of the armature conductors of a d.c. generator, rotating in a clockwise direction. Copy this diagram and hence:
(a) Indicate the direction of the field pattern of the magnetic poles.
(b) Indicate the direction of induced emf in each side of the coil.
(c) If this arrangement was to be used as a motor, with the direction of rotation as shown, indicate the direction of current flow required through the coil.
For a first order low pass filter, with a cut-off of 2 kHz, how many decades and octaves would the frequency be if the attenuation was -58 dB. What would the frequency be at that attenuation.
(a) find the value of a and K so that the relative damping ratio of the system is 0.5 and the rise time step response is approximately 1 s. (b) with the values of a and k found in previous question
Does the addition of cache and virtual memory to a von Neuman system change its designation as an SISD system? What about the addition of pipelining? Multiple issue? Hardware multithreading?
Name some of the Schmitt trigger applications. What is hysteresis of a Schmitt Trigger? What are the available packages of Digital ICs? How to identify a digital IC? What is Charge Coupled Device (CCD)? Name some of its advantages.
Frequently, the output of transducers are much smaller than what an A/D converter expects on its input. That would require an amplifier to match it. Sometimes the output does not start at 0V. Usually the minimum reference input voltage of an A/D
If an 8 kOhm load is connected to the terminals (a and b) of the unidentified linear circuit. Vab = 16 V. If a 2 kOhm load is connected to the terminals Vab = 8 V. Find Vab if a 20 kOhm load is connected to the terminals.
Design it to give an output that is 1/3 of the supply voltage. Furthermore neither the power ratings of the resistors nor the current rating of the supply are to be exceeded. The voltage output of the divider much not change by more than 1% when l..
A meter being used for a 2-wire resistance measurement has an internal current source of 1 mA. If the meter's test leads have equal resistances of 0.06-ohm, what is the measured resistance for: A resistor of actual value 0.5-ohm
At the very end of part a, when the average power delivered to the load is being calculated, why is it multiplied by10-6
Discuss the importance of electrical isolation when interfacing microcontrollers to higher voltage inductive circuits (motors). Include detail of how electrical isolation can be achieved to protect the microcontroller and motor.
A sample of HCL gas is placed in an electric field of 2-5 x 104 N/C. The dipole moment of each HCL molecule is 3.4 x 10-30 C-m. Find the maximum torque that can act on a molecule.
Use 9.81 m/s^2 as the acceleration due to gravity and 8.85 * 10^-12 C^2/Nm^2 as the permittivity of free space.
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