Search & Filtering
An energy source forces a constant current of 2 A for 10 s to flow through a lightbulb. If 2.3 kJ is given off in the form of light and heat energy, calculate the voltage drop across the bulb.
The relationship between the bandwidth expansion factor and the SNR is exponential
SNR2≈SNR1^B1/B2
•Double/triple the bandwidth & see the effect? Is it true the other way around (Effects of changing SNR)?
The full-load efficiency of a 400 V, 3-phase, 6 pole induction motor is 85%. It draws a line current of 80 A at 0.8 power factor lagging when it delivers full-load at 5% slip. Calculate the shaft output and shaft torque.
A pressure transmitter has the following specifications:
Lower Range Limit = 0.5 MPa
Upper Range Limit = 10.5 MPa
Reference Accuracy = .05% of span
Span Error = .10% of span
Zero Error = .05% of span
Thermal Span Error = .10% of span
Overpressure Error = .09% of span
What is the total error budget in MPa? (Type in a four-place decimal).
CrownHill Hospital Osogbo, assuming there is only one Consultant in the hospital.
Patients wait at the receptions until an auxiliary nurse call their names, and such a patient enters the consultancy room. The auxiliary nurse moves in between the consultancy room and the reception multiple times depending on the number of patient in the waiting room. In some cases when the auxiliary nurse is not with the doctor, the doctor has to shout on top of his voice to call the next patient. Now, assuming you are called upon to solve the problem in this hospital by designing a digital circuit.
a. Which of the sequential logic circuit can best used to model the solution of this problem?
b. Assuming the patients were in a group of 12 per consultation session, sketch the state diagram of the circuit.
c. Draw the truth table for your circuit.
Design a logic circuit that has three inputs, A, B, and C, and whose output will be HIGH only when the inputs decimal number is prime number.
Simulate the operation of a AND gate based RS Flip Flop with a truth table assuming the present and next states is M and N respectively.
Consider a 10-GHz airborne radar traveling straight, level, and forward at
200mph at an altitude of 30,000 feet. The antenna is pointed at an azimuth angle of
0degree and an elevation angle of -20 degree. What will be the radial velocity in meters per
second of echoes for stationary scatterers in the following locations:
(a) Directly ahead of the aircraft,
(b) At the point where the antenna boresight intercepts the ground,
(c) Directly below the aircraft,
(d) On the ground directly to the left or right of the aircraft (azimuth angle of +- 90degree),
and
(e) Directly behind the aircraft?
Consider two radars. The first is a 3-GHz weather radar having a desired
unambiguous range of 300 km and unambiguous velocity of 50m/s. The second is.
10-GHz airborne radar having a desired unambiguous range of 100 km and
unambiguous velocity of 250 m/s. For each radar, is a 1 kHz PRF considered to be low
or high PRF?
Consider a 5GHz (C band) radar using a pulse repetition frequency of 3500
pulses per second. The radar collects 30 pulses of data. The slow time data sequence
is zero-padded and input to a 64-point DFT to compute the Doppler spectrum.
(a) What is Doppler frequency resolution in Hertz (with and without zero padding)?
(b) What is the spacing in meters per second (with and without zero padding)?
(c) What are the blind velocities of this radar?
