
Q2 (A) Explain Kelvin's double arm bridge. bridge overcoming limitations of a wheat one
1. What is the function of a diode bridge rectifier? State one disadvantage of the diode bridge rectifier and describe a way of overcoming this. You may use words or sketch the circuit. [6 marks] 2. What is the function of a buck converter? Give an example application. Identify two limitations of this circuit. [6 marks]
An RTD forms one arm of a Wheatstone bridge, as shown in Figure below. The RTD in a balanced is used to measure a constant temperature, with the bridge operated mode. The RTD has a resistance of 25 V at a temperature of 0°C, and a thermal coefficient of resistance, α= 0.003925°C, The value of the variable resistance R1 must be set to 37 V to balance the bridge circuit. (1) Determine the temperature of the RTD. (2) Compare this circuit to the...
2. A RTD forms one arm of a Wheatsone bridge, as shwon in Figure 2. The RTD is used to measure a constant temperature, with the bridge operated in a balanced mode. The RTD has a resistance of 2512 at a temperature of 0°C, and a thermal coefficient of resistance, a = 0.003925°C-1. The value of the variable resistance R/ must be set to 41.48522 to balance the bridge circuit, with the RTD in thermal equilibrium with the measuring environment....
2) One arm of a Wheatstone bridge is a 50 k2 strain gauge (S = 2.0). This strain gauge is bonded to a metal fixture for tensile loading, and the metal has a Young's Modulus E-2.5 MPa. The other 3 arms are fixed 50 kO resistors. The bridge is powered by 5Vv DC as shown, and Eo is the output voltage. a) Derive a relationship for Eo as a function of tensile stress o in the metal substrate, ΔL ....
7.13 A resistive element of a force cell forms one leg of a Wheatstion bridge. If the no-load resistance is 500Ω and the sensitivity of the cell is 0.5 Ω/M, what will be the bridge outputs for applied loads of 100, 200, and 350 N if the bridge excitation is 10 V and each arm of the bridge is initially 500Ω?
Figure Q2 shows a double short-shoe drum brake rotating in clockwise direction. a) Which shoe is self-energizing and which one is self-deenergizing ? b) Find its torque capacity and required actuating force for a = 90 mm, b = 80 mm, e = 30 mm, r = 40 mm, w = 60 mm, and θ = 25°. c) What value of c will make it self-locking? d) Find the reaction forces at the arm pivot in the global XY system. Assume pmax= 1.5 MPa...
Select one type of cryptography or encryption and explain it in detail. Include the benefits as well as the limitations of this type of encryption. Your summary should be 2-3 paragraphs in length
Q1 The immediate template for PCR amplification is double stranded DNA. (True or False) Q2 A primer is a DNA oligonucleotide. (True or False) Q1 Denaturation of DNA double helix takes place at 96 C. (True or False) Q2 A primer is a single stranded DNA oligonucleotide. (True or False) Q1 16 doubled stranded DNA fragments are obtained from one DNA double stranded template after 4 cycles of PCR. (True or False) Q2 Denaturation of DNA double helix takes place...
And can you please explain why?
21. Which is not one of the limitations usually associated with the Friedel-Crafts alkylation reaction. a. Reaction fails when strongly deactivating substituents are present. b. Rearrangements of the carbocation intermediate are possible; n-alkyl derivatives are unavailable. c. Multiple alkylations frequently occur. d. Long branched chains of carbons cannot be used. e. An amine nitrogen cannot be present on the ring.
can some one help me explain this please? I dont understand
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Python 3.6 (known limitations) 1 mashup=(2, 'abc', 1, 'def'] 2 x=mashup[1][0] 3 print(x) Edit this code xecuted