Find the temperature coefficient of the resistance material, Electrical Engineering

Assignment Help:

The field resistance of a dc machine is 50 ohm at 20oC. The resistance increases to 55 ohm at 50oC. Find the temperature coefficient of the resistance material.

Ans:

Solution:

R = Ro[1 + α(t-to) where R and Ro are resistances at 50oC and 20oC

50 x 30 x α = 5

α = 5/1500= 3.3 x 10-3/oC


Related Discussions:- Find the temperature coefficient of the resistance material

Find the steady state values, Question: Consider the circuit shown in F...

Question: Consider the circuit shown in Figure. There is no initial energy stored in the circuit until time t=0 when the switch is closed. (i) Transform the given circ

Switching characteristics, Switching Characteristics The switching  cha...

Switching Characteristics The switching  characteristic  of an IGBT  during  turn on and turn off time all  shown  in the sum of delay time  and rise time gives  the total  tur

Energy stored in inductor, One circuit has resistor 40? connected in series...

One circuit has resistor 40? connected in series with inductor  15H and dc voltage 220V. Calculate: i)  Time constant ii)  Current at time (i) iii)  Current at time 0.0

Microwaves, derive the s parameters of a network by smith chart

derive the s parameters of a network by smith chart

Sketch the resulting transfer curves, Q. Consider the MOSFET circuit with v...

Q. Consider the MOSFET circuit with variable voltage, with RD = 2k and VDD = 12 V. The static characteristics of the n-channel enhancement MOSFET are given in Figure. (a) Drawt

Why fet is a voltage sensitive device, Q. Why FET is a voltage sensitive de...

Q. Why FET is a voltage sensitive device explain from the drain characteristics? The JFET consists of a thin layer of n-type material with two ohmic contacts,the source S and t

Determine current in mosfet circuit, Consider the basic MOSFET circuit show...

Consider the basic MOSFET circuit shown in Figure with variable gate voltage. The MOSFET is given to have very large V A , V T = 4V,and I DSS = 8 mA. Determine i D and v DS for

Explain about automatic stabilizers, Q. Explain about Automatic Stabilizers...

Q. Explain about Automatic Stabilizers? Automatic Stabilizers: Government fiscal policies which have effect of automatically moderating cyclical ups and downs of capitalism.

2365-305 Electrical systems design TASK A, Hi, I need help with this assign...

Hi, I need help with this assignment. Is this assignment something you can help me with?

Determine the three main types of intelsat satellite, a. Determine the rati...

a. Determine the ratio of cross section of a circular waveguide to that of a rectangular one, if each is to have similar cut off wavelength for its dominant mode. b. Compare wav

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd