Electric current and amount of substance

1. GOOD MORNING

3. AIR CURRENT WATER CURRENT

4. What is electric current?
Yes, Flow of electric
charges in a particular
direction is known as electric
current.

5. The magnitude of an electric current is the amount of
electric charges flowing through a conductor in one
second.
I= Q/t
Where,
I- is the electric current
t- time in sec
Q is the amount of electric charge in Coulomb.
Coulomb is the unit of electric charge

6. If one coulomb of charge
flows in one second in a
conductor, the current in it
is one Ampere.

7. What is one ampere?
one ampere is defined as one coulomb of
charge moving in a conductor in one second.
Which device is used to measure electric current?
Ammeter

8. What are super conductors?
Super conductors which conduct electric
current without any loss at very low
temperature i.e., around 30k.

9. Superconductors are used to levitate trains from the track.

10. Super conductors can be used as memory or storage elements
in the computers.

11. Can you count the
number of copper
atoms in a coin?
No, it is difficult to
count the number of
atoms because atoms
are not visible.

12. Amount of substance is a measure of (particles)
present in the substance.
Generally, the amount of substance is directly
proportional to the number of atoms or molecules.
The SI Unit of amount of substance is mole and it is denoted as

13. Mole is defined as the amount
of substance , which contains
6.023  1023 particles.

14. 1 mole of Nacl- 58.5g 1 mole of Carbon- 12g 1 mole of Aluminium- 27g

15. The number of atoms or
molecules or ions present in
one mole of a substance is
called Avogadro number.

16. What is electric current?
Define one ampere.
What are superconductors?
Define mole?