Answer / promise mbanga

Looking at this question from the chemistry point of view,
l can confidently say:

(i) Coal in form of graphate, is a good conductor of
electricity due to a free electron wondering around it's
bonds, hence the resitance of earth reduces due to the
presents of coal.

(ii) Salt in solution for does ionise to Na+ and Cl-
ions. These ions are good conductors of electricity, hence
the earth resistance does reduces when salt is present on
earth.

(iii) Water does partially ionise to give H3O+ and OH- ions
which conduct electricity. This also reduces the earth's
resistance.

Answer / ankush miglani

the hard water is one of the good conductor of elecricity
as explained in ship earthing.
the mixing of these things in earth makes the earth
conductive n hence reduces the earth resistance.

Answer / gkumar

Hi,
Both coal & salt acts as good conductor of electricity .
also when they are mixed & put in the earthing pit they
provide conductivity as well as moisture for better passage
of current

Answer / p mishra

Coal are the form of graphite which is a best conductor.So
for reducing the earth resistance we use coal.Like salt is
made of Na+ Cl-.These ions are good conductors of
electricity, hence the earth resistance does reduces when
salt is present on earth. Water conducts partially. So all
the materials when mixed the resistance/ohmic value is
reduced.

how to find insulation resistance of a generator(11kv) by theoritical formula??

1 Answers  

---

Define early construction of human being

0 Answers  

---

During regenerative breaking= A rotating magnetic field is reversed B slip is positive C torque is positive D slip is negative

0 Answers   Core Solutions,

---

1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?

0 Answers  

---

how netral CT is selected (including its details specification)

8 Answers   ABB, ABC, dbpl, Mecon, Shree Engineering, Tapasya Transformers,

---

---

explain different types of d.c motors?

0 Answers  

---

what happen if we give square wave instead of sine wave to the transformer

8 Answers  

---

why the voltage and current in a long transmission line are called travelling wave?

0 Answers   UIU,

---

orifice sizing how done, checking & selection

0 Answers  

---

what will happened to give the dc supply to ac transformer?

3 Answers   Sail,

---

What is the knee point voltage of CT-100/5,15VA,5P20 ?

3 Answers   ERL, NTPC,

---

what are the C&D CHECK OF DG set

1 Answers   HCL,

---