Drinking water is chemically treated and purified by removing various impurities and salts from it. While the sea water contains lots of mineral salts. Therefore, sea water produce more ions (more electric charges) as compared to drinking water and the child sees more deflection in magnetic needle iRead more
Drinking water is chemically treated and purified by removing various impurities and salts from it. While the sea water contains lots of mineral salts. Therefore, sea water produce more ions (more electric charges) as compared to drinking water and the child sees more deflection in magnetic needle in case of sea water.
The water usually contain salts and is a good conductor of electricity. To save themselves and others from electric shock and to avoid any short circuit, firemen shut off the main electrical supply for the area. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
The water usually contain salts and is a good conductor of electricity. To save themselves and others from electric shock and to avoid any short circuit, firemen shut off the main electrical supply for the area.
Pure or distilled water does not contain salts. Therefore it is a poor conductor of electricity. We can add impurities like salt, lemon juice, vinegar etc. to make it conducting. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
Pure or distilled water does not contain salts. Therefore it is a poor conductor of electricity. We can add impurities like salt, lemon juice, vinegar etc. to make it conducting.
The deflection of magnetic needle indicates electric current is flowing through the wire. It means the liquid or the solution is a good conductor of electricity. When the free ends of a tester are dipped into a solution, electric circuit is completed and an electric current passes through the solutiRead more
The deflection of magnetic needle indicates electric current is flowing through the wire. It means the liquid or the solution is a good conductor of electricity. When the free ends of a tester are dipped into a solution, electric circuit is completed and an electric current passes through the solution.
A child staying in a coastal region tests the drinking water and also the seawater with his tester. He finds that the compass needle deflects more in the case of seawater. Can you explain the reason?
Drinking water is chemically treated and purified by removing various impurities and salts from it. While the sea water contains lots of mineral salts. Therefore, sea water produce more ions (more electric charges) as compared to drinking water and the child sees more deflection in magnetic needle iRead more
Drinking water is chemically treated and purified by removing various impurities and salts from it. While the sea water contains lots of mineral salts. Therefore, sea water produce more ions (more electric charges) as compared to drinking water and the child sees more deflection in magnetic needle in case of sea water.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
See lessIn case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.
The water usually contain salts and is a good conductor of electricity. To save themselves and others from electric shock and to avoid any short circuit, firemen shut off the main electrical supply for the area. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
The water usually contain salts and is a good conductor of electricity. To save themselves and others from electric shock and to avoid any short circuit, firemen shut off the main electrical supply for the area.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
See lessDoes pure water conduct electricity? If not, what can we do to make it conducting?
Pure or distilled water does not contain salts. Therefore it is a poor conductor of electricity. We can add impurities like salt, lemon juice, vinegar etc. to make it conducting. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
Pure or distilled water does not contain salts. Therefore it is a poor conductor of electricity. We can add impurities like salt, lemon juice, vinegar etc. to make it conducting.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
See lessA tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dimly for liquid B. You would conclude that
(i) Liquid A is a better conductor than liquid B. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
(i) Liquid A is a better conductor than liquid B.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
See lessWhen the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?
The deflection of magnetic needle indicates electric current is flowing through the wire. It means the liquid or the solution is a good conductor of electricity. When the free ends of a tester are dipped into a solution, electric circuit is completed and an electric current passes through the solutiRead more
The deflection of magnetic needle indicates electric current is flowing through the wire. It means the liquid or the solution is a good conductor of electricity. When the free ends of a tester are dipped into a solution, electric circuit is completed and an electric current passes through the solution.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-14/
See less