class 8 science chapter 14 - Chemical Effects of Electric Current Full Chapter | Mannu Ka Gyan

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class 8 science chapter 14 - Chemical Effects of Electric Current | Mannu Ka Gyan

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► chemical effects of electric current
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► CBSE Class 8 Science
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Thanks for providing background -

[palak]

Because when they do not shut off the main electrical supply for the are the firemen get shork. And the water is also good conductor of heat. In our house the water is not distilled. It can be dangerous to stop fire when the electric supply of area is not shut off. So, they do this.

[soniasharma]

Another term for electroplating is ""The process of depositing a layer of any desired metal on another material by means of electricity is called electroplating ".

[nayanthakornayanthakor]

Your are very nice sir your voice is very sweet

[Kamlesh]

The answer is water is good conductor of heat and electricity so in case of 🔥 fire the fireman shut off the electricity in that area sir my answer is write please reply 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏you are the best teacher 👏👏👏👏👏👍👍👍

[sunilpal]

Sir in pure water case the electricity doesn't passes because in pure water there are no mineral . And if we want to make the electricity pass so, we want to mix salt in it

[hemantkumargupta]

Vo student Kitna lucky Hoga jisko Mannu sir padate hai
Sir you explained in a simple and intelligent way sir
And your voice is so good😇😘

[ayushp]

Answer1. No pure water doesn't conduct electricity. We make it conducting while adding pitch of salt in them.

Answers 2.fireman cut the supply of electricity because the may give them an electrical shock while doing this so.

If its helpful so plz hits like.👍👍👍👍👍👍👍👍👍👍👍👍👍👍

[tanupriya]

Sir I think vinegar is good conducter because it contains acid

[amittripathi]

homework
answer 1 . no pure water or distilled water does not conduct electricity because it do not have any salts dissolved inside, so how they can break into ions and conduct electricity,
to make it conducting we can add salt or acid or base . thus, after it can break into ions in the electrotyle .mannu bhaiya :D
ANSWER 2 : THE ELECTRICANS CUT OFF THE ELECTRICITY SUPPLY IN THE FIRE CASE BEACUSE AS WE KNOW IT CAN LEAD THEM TO ELECTRIC SHOCK ....
THANK YOU MANNY BHAIYA :D

[anjanadastarafdar]

Ans. The water used in water hoses is not pure water and it conducta electricity. Firemen
shut off the main electrical supply of the area because if the supply of electricity
continues there may be high risk of electrocution in the whole area due to water.

[premsinghnegi]

30:46 No pure water didn't conduct electricity . We can add salt for make it conducting

[_anything_]

Ans. Because the water contained in the water 💧 hoses is not pure water which is conductor of electricity. So the fireman switch off the main power supply before spraying water to save himself and other people from electrocution.

[murlidharsurwase]

thank you sir for this great explanation😊

[Alone_YT]

NCERT Class 8 ch 14 science Ans 6 -No, Pure Water can't conduct electricity. But, If we mix salt in pure water, so salt produce NACL and, distilled water conduct Electricity.

[padmashreejewellers]

Question1. Does pure water conducts electricity? If not, then what can we do to make it conducting?
Answer. Pure water does not conducts any electricity because it does not have any salts or minerals dissolved in it(and if a substance does not have any acid, bases or salts dissolved in it, it is unable to conduct electricity). Therefore, to make water a good conductor of electricity we should add some salt, acid(such as vinegar) or base(such as baking soda) in it.

Question2
Answer: Water is a good conductor of electricity. So, if the electrical supply for the area is not shut off and water is spread over electrical appliances, then electricity may pass through water and harm the firemen. Therefore, in case of a fire, the firemen shut off the main electrical supply for the area before they use the water hoses.

[aniketbhardwaj]

Thanx for very good explanation ☺️☺️☺️😊😊

[xXjustakoolgurlxX]

Manu ka gyan answer is distilled water like milk are not conduct electric if we add salt it will conduct
And waht is used of led
As Indicators in electric appliances
As a point of source in light of laser beam torch
Led emmiting white light can be use instead of Bulbs long thread should be connected to postive and short to negative

[shreyasingh]

Sir aapko itna subscriber kyu nhi miltey kyu ki aap bhut aachha paratey hai

[timligapulistudio]

Add salt to pure water to pass electricity

[sunitakanwar]

this video help me very much in my exams thank you " MANNU KA GYAN " for helping me in exams