Calculate the length of the wire required to get resistance, Electrical Engineering

Assignment Help:

An  electric  heater  element  is  made  of  Nichrome  wire  having  resistivity  equal  to 100 ×10-8 ohm-metre. The diameter of the wire is 0.3 mm. Calculate the length of the wire required to get a resistance of 30 ohms.

As the heater element is Nichrome ρ = 100x 10-8 ?-m.

a = (π/4) (0.3×10-3 )2 m2

a = 7.069 x 10-8 m2

R =30 ?

R = ρ (I/a) or 30 = (100 ×10-8 × l)/ (7.069 ×10-8)

I = 2.12 m.


Related Discussions:- Calculate the length of the wire required to get resistance

Digital Electronics, You are expected to do the experimentation on digital ...

You are expected to do the experimentation on digital electronics and realize the result...

Bad effects of armature reactions, Q.  What is meant by armature reaction....

Q.  What is meant by armature reaction. Explain briefly the bad effects of armature reactions.   Sol. By armature reaction is meant the effect of magnetic field set up

Unconditional call instruction - call instruction , Unconditional Call Inst...

Unconditional Call Instruction CALL ( Unconditional Call) Instructions :This  instruction calls the subroutine program stored at memory  location specified  in the  instruction

Three phase steam turbine generator, A 3 phase 400 volt(line to line) wye c...

A 3 phase 400 volt(line to line) wye connected synchronous motor has Xs= 1 ohm per phase and a negligible armature resistance. The field current is so adjusted that the internal(in

Determine the equivalent capacitance, Q. Determine the equivalent capacitan...

Q. Determine the equivalent capacitance at terminals A-B for the circuit configurations shown in Figure.

What is autotransformers, Q. What is Autotransformers? In contrast to a...

Q. What is Autotransformers? In contrast to a two-winding transformer, the autotransformer is a single-winding transformer having a tap brought out at an intermediate point. Th

Find the slip and the rotor frequency at full load, Q. A three-phase, 50-Hz...

Q. A three-phase, 50-Hz induction motor has a full load speed of 700 r/min and a no-load speed of 740 r/min. (a) How many poles does the machine have? (b) Find the slip and t

Electric machines, a shunt motor supplied at 230V rms runs at 900rev/min wh...

a shunt motor supplied at 230V rms runs at 900rev/min when the armature current is 30A.the resistance of the armature circuit is 0.4 ohms.find the armature input

Zero flag - sub subtract instruction , Zero Flag Since results  is n...

Zero Flag Since results  is non  zero in this  example zero  flag is reset.

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