LAB 6 report

For a PMDC, you are given the following data: Vt=136 V, N2=1210 rev/min, T2=0.63 Nm, la=1.7 A, Ra=9.6 ohm. Calculate the following to four significant figures. Calculate the open circuit armature emf when the armature rotates at 1210 rev/min. Calculate the generated emf constant Km. Calculate the electrical damping constant De Calculate the mechanical Damping Constant Dm.

2. An AC voltmeter uses a bridge rectifier with silicon diodes and a PMMC instrument with FSD = 75 µA. If the meter coil resistance is 900 Q and the multiplier resistor is 708 k2, calculate the applied rms voltmeter when the voltmeter indicates FSD.

A sensor resistance changes linearly from 100°C to 130°C as shown in the Table Q1a. Find the linear equation relating resistance and temperature. Assume To= 115°C is midpoint temperature. T(°C) R(N) 90 562.66 95 568.03 100 573.4 105 578.77 110 584.13 115 589.48 120 594.84 125 600.18 130 605.52

03 Determine operation point of the BJT in figure shown below. Assume B = 200. Rc 330 N RB Vcc 20 V 47 kN VBB 10 V Pie 1slami Cncersity The

Question 1. A galvanometer has a current sensitivity of 1uA/mm and a critical damping resistance of 1 k. Calculate: (a) the voltage sensitivity and (b) the megohm sensitivity.

please solve asap.

9. The intermediate lead wire has no influence on the thermocouple resulting voltage as long as the two new junctions has the same temperature. o True o False 10. An ultrasonic sensor with a range of 0 to 10 m is used to measure distance in mobile robot, the actual distance measured by a ruler is 7.2 m while the ultrasonic reading is 7.25 m. Calculate the accuracy and relative error of the sensor.

a) Derive the mathematical model of a thermal system. Also, write the differential equation for the electric circuit shown in Figure 1 below and find the output. E₁ R₁ M P FR₂ Figure 1 R3 E0 ↓

A 30 PM machine has electrical parameters: Rs = 0.2N, Ls = 200µH, and ApM = 20mWb, and has mechanical parameters: Bm = 0.01Nms, Jm = 0.5 kg m², and p = 16 poles. a. If the machine operates with ig = 50A, wm = 100rad/s, and TsH = 5Nm, what will be the angular acceleration of the machine, a, in [rad/s?]? Ignore any static friction, To = 0. b. If the machine operates at steady-state (all derivatives equal to zero) with parameters: wm = 200rad/s, TsH = 10NM, ia = 0A, iq = 50A, va = -16V, & vą = 42V, compute the efficiency of the machine, ŋ, considering copper and friction losses. %3D

Explain how the circuit works. Explain the connection of each components   Note: When the circuit receives light, the motor begins to run, and when there is no light, the motor stops. This circuit is used for an automatic curtain that opens when there is sunlight and closes when there is no light.

9. Which of the following equation represents mass semiconductors in electronic circuits? action law for 2 a) n xp = n₁² b) n x p = n₁ c) n xp = n³ 3 d) n xp = n₁¹/²

Solve all parts.

6. Why is it important to measure Strain? 7. What is your own understanding of Young's Modulus? 8. What is the major difference between stress and strain? 9. What is the mathematical relationship between voltage and strain based on your data? 10. What is the mathematical relationship between voltage and stress based on your data?

topic: diodes the data in the table is obtained using electronics workbench simulation. answer the following blanks using computation. (the second picture is the circuit illustration in forward biasing)   given: Vs = 10V and R1 = 1.2KΩ

Define and describe the various circuit stages required to design a DC power supply(specifically, explain the required circuit stages of the empty boxes as shown below). Your answershould include names of the circuit stages, a schematic of an appropriate circuit to accomplisheach stage (no need to define values), and a short description of each circuit stage.

Can you solve this? thanks

Please solve for following based on attached circuit: average laod current RMS load current average load power absorbed apparent source power

1. The full-wave controlled bridge rectifier shown has an ac input of 120 Vrms at 60 Hz and a 52 load resistor. The delay angle is 30°. Determine the average current in the load, the power absorbed by the load and the source voltamperes. V₁ I sin cor H www + Vo

Explain the differences between metals, polymers and ceramics in terms of its atomic structure and their properties QI (a) (b) Your team is working on a new walkie-talkie design that must be able to withstand harsh weather conditions. Choose the suitable type of material that should be used as the casing of the device. State your reasons from mechanical and electrical aspects.

For step response of an under damped second order system, the settling times are given as: ts1: for 1% tolerance band, ts2: for 10% tolerance band. Then determine the ratio between ts2 and ts1 13.33 O 0.5 02 0 1

1- A testing transformer 220 V/100 kV (rms), 50 Hz is supplying a half wave rectifier circuit. If the load resistance is 5 MΩ, find: a- The value of the smoothing capacitor so that the time constant is 10 times the supply periodical time. b- The rated peak inverse voltage (PIV) of the rectifier. c- The number of series connected rectifiers if the rated PIV of a rectifier is 20 kV. d- The ripple and the output voltages. the sub-parts to be solved.

A J- type thermocouple is used to measure the temperature in a heating process. Sheath material used is SS304. The length of the sheath is 11mm and thickness is 0.2mm. Find the time constant of the sheath. s(J/Kg K(W/m- Material Q(kg/m3) - °c) k) Platinum 21450 130 71.6 SS304 8030 500 21.4 SS316 7990 500 21.4 SS410 7750 460 24.9 Air 1.20 П005 0.025 MgO Powder 3580 877 26.8 Silicon 3210 800 compound Time constant of the bare material is, T=

a) Explain the importance of thermal management of electronics devices.  (b) Heat sink rated at 10°C/W will get 10°C hotter than the surrounding air when it dissipates 1 Watt of heat. Discuss the suitability of heat sink for above scenario in terms of thermal resistance. (c) Thermocouples are commonly used to measure temperature. There can be errors due to heat transfer by radiation. Consider a black thermocouple in a chamber with black walls Suppose the air is at 20 °C, the walls are at 100 °C, and the convective heat transfer coefficient is 15 Wm-2 k -1 . a) What temperature does the thermocouple read?  b) If thermos couple sees a higher temperature than air, how could you reduce this error?

Calculate DC Voltages on each terminal of the FETS or MOSFETS. +15 V -10 V +12 V 8 mA| Rp 1.0 kfn 6 mA Rp 1.5 kf2 RD 1.0 kf2 R1 10 kfn 3 mA Ra 10 Mn RG 10 MN Rs 330 0 R2 4.7 kf2 (b)

Please please answer the all of question two

21 Balance is obtained in a DC potentiometer at a length of 71 cm when using a standard cell of 53.2 volts. Calculate the EMF of a dry cell if balance is obtained with a length of 20 cm. a. 0.07 b. 14.99 c. 0.01 d. 188.86