NCERT 8th Class (CBSE) Science: Chemical Effects of Electric Current

Question: What are the two types of electricity on the basis of charge?

Answer: The two types of electricity on the basis of charge are:

1. Static electricity: The electricity cause by the charge at rest.
2. Current electricity: The electricity cause by the charge when in motion

Question: What is the cause of the flow of charge?

Answer: Electric potential or potential difference is the main cause of electric charge.

Question: What do you mean by chemical effect of current?

Answer: The phenomenon of causing chemical change by passing electric current through a conduction solution is called chemical effect of current. For example: Electrolysis and Electroplating.

Question: What do you mean by heating effect of current?

Answer: Whenever current flows through a conductor it causes heating of material. This effect of current is known as heating effect of current.

Question: What do you mean by magnetic effect of current?

Answer: Whenever current flows through a conductor it behaves like a magnet. This effect of
current is known as magnetic effect of current.

Question: What is LED?

Answer: LED stands for Light Emitting Diode. LED glows even when a weak electric current flows through it.

Question: What precaution you should take to add LED in a circuit?

Answer: The longer lead is always connected to the positive terminal of the battery and the shorter lead is connected to the negative terminal of the battery.