A primary cell cannot be recharged whereas a secondary cell can be recharged.
In a primary cell chemical reaction is irreversible whereas in a secondary cell chemical reaction is reversible.
The internal resistance is high for a primary cell whereas it is low for a secondary cell.
In a primary cell, chemical energy is converted into electrical energy when current is drawn from it whereas in a secondary cell electrical energy is converted into chemical energy when current is passed through it and chemical energy is converted into electrical energy when current is drawn from it.
A primary cell is light and less expensive whereas a secondary cell is heavy and expensive.
Let two A.P's have the first terms a , a' and common difference d.
Given that difference between their 100th term is 100.
then a + 99d - a' - 99d = 100
⇒...
The classification of economic activities into primary, secondary and tertiary is useful on account of the information it provides on how and where the people of a country are employed....
The information which is collected by the investigator himself with a definite objective in his mind is called as primary data whereas when the information is gathered from a source...
Answer: (ii) proper diet is needed for the rapid growth taking place in their body.
Answer: (i) menstruation starts.
Answer: (ii) chapatti, dal, vegetables.
Appearance of moustache and beard.
Appearance of chest...
(b) Primary and secondary markets complement each other. Primary market deals with the issue of new securities. That is, through the primary market a company raises capital directly from the borrowers....