Thermal –root , Electrical Engineering

Assignment Help:

A moving coil galvanometer consists of a coil  in a uniform magnetic field Bo, suspended fro a fibre of torque constant C, current I produces a deflection O=nABoi/c where n is the number of turns  and A is the area of the coil. The period of oscillation T=2?(I/C)1/2 where I is the moment of inertia. The resistance of the coil and the circuit in which it is placed is adjusted to give a critical dumping Rc=n2 A2Bo2/2(ic)1/2 . if the minimum detectable current produces deflection equal to thermal -root mean square value O, show that minimum current is given by

imin  =( ?KT/ TRc)1/2

 


Related Discussions:- Thermal –root

Ideal or perfect transformer, a) A 230 V/25V, 50 HZ transformer with a rate...

a) A 230 V/25V, 50 HZ transformer with a rated primary current of 1,2 Amps is used to supply a number of 25 V, 30 Watt halogen light bulbs. Assuming an ideal transformer and tha

Cro, Diagram and explanation of cro

Diagram and explanation of cro

Compute the required value of external series resistance, A 200-V dc shunt ...

A 200-V dc shunt motor has a field resistance of 200  and an armature resistance of 0.5 . On no load, the machine operates with full field flux at a speed of 1000 r/min with an a

For an n-channel jfet find voltage, Q. For an n-channel JFET with V A = 35...

Q. For an n-channel JFET with V A = 350 V, I DSS = 10 mA, and V P = 3V, find V DS that will cause i D = 11 mA when v GS = 0.

Determine the electromagnetic force on the plunger, Q. Consider the electro...

Q. Consider the electromagnetic plunger shown in Figure. The λ-i relationship for the normal working range is experimentally found to be λ = Ki 2/3 /(x+t), where K is a constant. D

Power semiconductor-controlled drives, Q. Explain Power semiconductor-contr...

Q. Explain Power semiconductor-controlled drives? Power electronics deals with the applications of solid-state electronics for the control and conversion of electric power. Con

Short-term measures for technical loss reduction, Short-Term Measures for T...

Short-Term Measures for Technical Loss Reduction The short-term measures involve measures needs for immediate improvement and reduction of losses within the system. These are

Circuit analysis, what is quality factor in term circuit analysis

what is quality factor in term circuit analysis

Digital electronics, With the use of clocked JK flip-flops, draw and explai...

With the use of clocked JK flip-flops, draw and explain the working principle of a 3-bit binary ripple counter.

Find the ratio of amplifier gain, The input to the satellite system of Figu...

The input to the satellite system of Figure 1 is a step function θ c (t) = 5u(t) in degrees. As a result, the satellite angle θ(t) varies sinusoidally at a frequency of 10 cycles p

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