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Current (I) : Current can be defined as rate of flowing of charge (Q).
i.e
I= Q/t
where Q= Charge in coulumb
I = current in Ampere
t= Time in second.
1 Ampere is the charge flowing through a conductor in 1 second.
Q= I x T Amp-Sec
In an ionised electrolyte charged ions flow from one plate to another. For example negative ions flow from cathode to anode and positive ions flow from anode to cathode. charge of 1 e = 1.6x10-19 Coulomb
or 6.25x1018 electrons= 1 coulomb

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Ratio Mathematics ICSE Tutorial Class 7

There are four videos of Ratio class 7. Few sums have also been explained with very easy steps. If there are any doubts then comment below. We will try to clear those doubts.

1. Understanding Ratio:


2. Comparing Ratio Basic and Shortcut method:

3. Compound Ratio , continued Ratio Dividing a number in a given Ratio:

4. Solution of few problem of ratio:
These sums of Ratio class 7 have been discussed in this video:
1. write in simplest form
72:108, 1/6:1/2,
15cm to 4m.
2. Population of a village is 32400. The ratio of literate
to illiterate person in the village is 11:7. Find the actual number of literate person and illiterate person. .
3. If a, b and c are three numbers such that a:b=4:9 and b:c=27:35. Find a:c
4. In what ratio should we increase 650 to obtain 1000.