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

Harmonics, how harmonics shows effect on power systems?

how harmonics shows effect on power systems?

Determine the capacitance length of a pcb embedded stripline, 1. Determine ...

1. Determine the capacitance length of a PCB embedded stripline, assuming no fringing of the electrostatic field. 2. Determine the capacitance/unit length of the same embedded stri

The direction of motion, At what velocity must a conductor 75 mm long cut a...

At what velocity must a conductor 75 mm long cut a magnetic field of flux density 0.6 T if an e.m.f. of 9 V is to be induced in it? Suppose the conductor, the field and the directi

Shunt dc motor, Shunt DC motor In this arrangement, the armature and f...

Shunt DC motor In this arrangement, the armature and field coils are connected in parallel (the motor is called 'shunt connected').     Analysis With refere

Define short lines, Define Short Lines? For short power lines (up to 50...

Define Short Lines? For short power lines (up to 50 miles; 80 km),  the effects of the shunt capacitance and leakage resistance are negligible. Hence the line may be represente

Function of circuit - breaker, Q. Function of circuit - breaker, difference...

Q. Function of circuit - breaker, difference between circuit breaker and 'isolator'? Ans: The function of circuit breaker is to break the electrical continuity in the event o

Transistor configurations, TRANSISTOR CONFIGURATIONS: Transistor circu...

TRANSISTOR CONFIGURATIONS: Transistor circuits may be categorized into three configurations based on which terminal is common to both of the input and output of circuit. Th

Compute the full-load speed, A 10 - hp, 250-V shunt motor has an armature c...

A 10 - hp, 250-V shunt motor has an armature circuit resistance of 0.5  and a ?eld resistance of 200 . At no load, rated voltage, and 1200 r/min, the armature current is 3 A. At

What is absolute permittivity, Absolute permittivity (ε):  Permittivity ...

Absolute permittivity (ε):  Permittivity is a capacitance or ability to kept energy of a capacitor.  A force was also generated, called as electric force and the symbol. It d

Explain current divider rule, Explain current divider rule Current flow...

Explain current divider rule Current flow through at every resistor that connected by parallel can be find by using current divider rules (CDR).

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