Alert: You are not allowed to copy content or view source
Check Exam Dates here | See Marking Scheme here | Frequently Asked Questions (FAQs) | Buy Practice Papers for CREST Olympiads here | Last Date for CREST Reasoning Olympiads (CRO) Registration is 20th June 2019 | CREST Reasoning Olympiads (CRO) is scheduled for June/July. Apply now

Was this article Helpful?

Chemical Effects Of Electric Current

Chemical Effects Of Electric Current
science Square
Science Square

 

  • Electric current is the flow of electrons in any substance or material. 

Good conductors of Electricity

  • When the current is allowed to go through the materials then those materials are said to be good conductors.
  • Examples are aluminium, copper, etc.

 

class 8 chemicaleffects

 

Poor Conductors of electricity

  • When the current is not allowed to go through the materials then those materials are said to be good conductors.
  • Examples are plastic, glass, etc.

class 8 chemicaleffects

 

Conductivity in liquids

  1. To check the conductivity in the liquids, a tester can be used.
  2. The two ends of tester connect the liquid to check the conductivity. If the bulb glows in the tester then it means that the liquid is conducting but it will be non-conducting is the bulb does not glow.

 

Heating effect of current

  • The glowing of the bulb can tell about the heating effect of current.
  • LED’s can also be used to now the weak currents because the filament in LED does not need high temperature to glow.

class 8 chemicaleffects

 

Magnetic Effect of current

  • The magnetic effect of a current can be tested using a compass.
  • To detect the deflection in the magnetic compass, the magnetic effect of current is responsible when the current crosses nearby it.
  • It can also detect weak currents.

class 8 chemicaleffects

 

Chemical effects of Electric current

  1. Electrodes
  • Electrodes are the materials which are the conductors by which current leaves or enter a substance.

class 8 chemicaleffects

 

Types of Electrodes

  1. Positive electrode
  • The electrode which is jointed to the positive terminal of a battery is known as the positive electrode.
  • An anode is also a name given to positive electrode.

 

  1. Negative electrode
  • The electrode which is jointed to the negative terminal of a battery is known as the positive electrode.
  • A cathode is also a name given to positive electrode.

 

Electroplating

  • When the layer of one metal is deposited on the other material using electricity then that process is called as electroplating.
  • Electroplating is used in various activities at various places.

 

Applications of electroplating

  • In industries for the coating of different materials with the other metal objects.
  • As a coating on gold and silver.
  • Tin is used to electroplate the iron cans.

 

Recap

  • Electric current is the flow of electrons in any substance or material.
  • When the current is allowed to go through the materials then those materials are said to be good conductors
  • When the current is not allowed to go through the materials then those materials are said to be good conductors.
  • To check the conductivity in the liquids, a tester can be used.
  • When the layer of one metal is deposited on the other material using electricity then that process is called as electroplating.

Comments

Please to write a comment.

Quiz for Chemical Effects Of Electric Current

Your Score: 0/10

Other Chapters of Class 8

  EXPLORE  

70%