a.Agent X and Agent Y are two spies who want to transmit a secret message to their headquarters. In order to ensure secrecy, half of this message is to be transmitted in Urdu by Agent x while the other half in Pashto by Agent Y Both halves when decoded together at the headquarters can convey the complete information and therefore must be sent in a single transmission

They have an AM transmitter but it has one problem that it can only transmit one carrier frequency. How can they simultaneously transmit both messages using this AM transmitter?

b. A radio transmitter TX1 is using amplitude modulation with maximum bandwidth of 10 kHz Due to some technical issue, the amplitude modulator stops working Technicians found out that it will take at least two days to repair the modulator. They have a frequency modulator and they want to use it to transmit the information using frequency modulation. Is it possible with the given constraints? Why or

why not?

For a power supply with full wave bridge rectifier, input voltage is 230 V and required output voltage

is 12 V DC Load resistance is of 100 . Determine output rms voltage, dc current, rms current, power, ac power, efficiency of the rectifier, form factor, ripple factor, transformer utilization factor,

and size of the transformer Draw complete diagram of the supply circuit

Arrange the likely impedance in the following category of systems from the highest to lowest. Unearthed, solidly earthed, impedance earthed. (2

theme: laplace

specify multiple applications in real life

1. What is meant by logical effort. Discuss the logical effort of a 3 input, NAND and NOR gates

Draw the block diagram of phase-shift method and explain how the carrier and unwanted sideband are suppressed

draw appropriate diagrams and explain in detail, why in common emitter amplifier we should have the ac signal between base and emitter to be much less than the thermal voltage

Determine the energy at which the Boltzmann approximation may be considered valid. Calculate the energy, in terms of kT and EF, at which the difference between the Boltzmann approximation and the Fermi-Dirac function is (a) 2%, (b) 5%, (c) 10%, and (d) 20% of the Fermi function.

Mrs. Halima has bought an ultrasonic ranging sensor module HC-SR04. P1.1) If the manufacturer claims this sensor to be IP66 compatible. Please explain the properties of the sensor Mrs Halima must check in this context! (4 points)

Explain in detail the differences between 4-Bit Synchronous and Asynchronous
Counters. Each Flip-Flop is negative-edge triggered. Use the relevant block
diagrams, Truth Table of state sequence, and Timing Diagram to support your
explanation.

Design a modified sequence counter (Student ID Counter) that will count out the following sequence: The first four unique digits in your StudentID (not including the digit 9) followed by the digit 9 and then repeat. Use the excitation table method for your design. Treat unused states as “don’t cares”. Include a switch to initialize the counter to the first count in your sequence. Your design should include the following:

• a state diagram (include only the valid states)

• a circuit excitation table used to determine JK flip-flop input connections

• the K-maps used to generate minimal expressions for JK inputs

(use: 72569, and repeat)

Please help!

Suppose we need to connect Computer Network Research Lab (CNRL) network with address 167.89.0.0 through a router to the EE Department network with address 123.0.0.0 and connect CNRL network through a router to the EE Research network with address 222.22.2.0 . Please draw a diagram for this network connection. Choose IP addresses for each interface of each router and show several hosts on each network, with their IP addresses. Please briefly explain each step.

Q1. A station supplies 250 kVA at a lagging power factor (p.f) of 0·8. A synchronous motor is connected
in parallel with the load. If the combined load is 250 kW with a lagging p.f. of 0.9, determine :
(i) the leading kVAR taken by the motor.
(ii) kVA rating of the motor.
(iii) p.f. at which the motor operates.

Q2. A factory consists of the following
(i) An induction motor of 150 h.p with 0.7 p.f lagging and 80% efficiency.
(ii) A synchronous motor of 100 h.p with 0.85 p.f leading at 90% efficiency.
(iii) A lightning load of 50kW.
Find the annual electric charges if the tariff is Rs 100 per annum per kVA maximum demand plus 7
paise per kWh ; assuming the load to be steady throughout the year.