Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
The resistance of a wire is 60 ? at 25oC and 65? at 75oC. Find the resistance of wire at 0oC and value of temperature co-efficient at 0o C.
Ans:
Given R25 = 60 ? and R75 = 65 ?
Rt = R= (1 + α t)
Rt = RO (1 + αO t)
R25= RO (1 + αO 25) -----------------(1)
R75= RO (1 + αO 75) ------------------(2)
Divide (1) with (2)
(R25/ R75) = (RO (1 + αO 25))/(RO (1 + αO 75))
60/65 = (1 + αO 25)/( 1 + αO 75)
60 + 4500 αO = 65 + 1625 αO
2875 αO = 5
αO = 5 / 2875 = 0.001739 / 0C
R25 = RO (1 + 0.001739 X 25)
RO = 60 / 1.04348 = 57.49 ?
short note on thermal runaway
Describe 74LS139 memory decoder. The 74LS139 is a dual 2-to-4 line decoder. This contains two separate 2-to-4 line decoders - all with its address, output and enable connection
Aloudspeaker is a common electrochemical transducer in which vibration is caused by changes in the input current to a coil which, in turn, is coupled to a magnetic structure that c
Why is the signal first attenuated and then amplified?
Q. Explain about Direct-current machines? Generally speaking, conventional dc generators are becoming obsolete and increasingly often are being replaced by solid-state rectifie
Q. Explain about Synchronous machines? Large ac power networks operating at a constant frequency of 60 Hz in the United States (50 Hz in Europe) rely almost exclusively on sync
Explain Microprocessor development system. Microprocessor development system: Computer systems consist of undergone many changes lately. Machines which once filled large area
To demonstrate a practical method of testing semiconductor diodes.
1. A modi?ed NRZ code known as enhanced-NRZ (E-NRZ) operates on 7-bit words; invert- ing bits 2,3,6 and 7; and adding one parity bit to each word. The parity bit is chosen to make
In this design, there are 24 line finders. If any of the 100 subscribers has to get access to any of 24 two-motion selectors, it is necessary that every line finder is capable of r
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd