In this presentation we shall discuss in detail about electric current which is one of the topic studied in Physics.

1. ELECTRIC CURRENT
By-Bhushan Deore

2. WHAT IS ELECTRIC CURRENT?
▶ Electric current consists of charges or electrons through a
conductor.

3. EFFECTS OF A CURRENT
▶ Heating and lighting-The lamp lights because the small wire
inside the filament is made white hot by the current.
▶ Magnetic-The plotting compass is deflected when it is deflected
▶ Chemical-Bubbles of gas are given off at the wires in the acid
because of the chemical reaction of the current.

4. THE AMPERE AND THE
COULOMB
▶ The unit of current is ampere which is defined using the
magnetic effect.Currrent is measured by an ammeter.
▶ The unit of charge is coulomb is defined in terms of ampere.
▶ Expression connecting charge and current-
Q=I *T

5. CIRCUIT DIAGRAMS
▶ Currents must have a complete path(a circuit) of conductors if it
is flow.
▶ Circuit symbols-

6. SERIES CIRCUIT
▶ In a series circuit the different paths follow one after the other
and there is just one path to follow.Ammeter is always connected
in series circuit.
▶ The current is same at all points in a series circuit.

7. PARALLEL CIRCUIT
▶ In parallel circuit the lamps are side by side and there are
alternative paths for the current .The current split: some part goes
through one lamp and some goes through the other. The current
from the source is larger than the current in each branch.
Voltmeter is always connected in parallel circuits.
▶ The sum of the currents in the branches of a parallel circuit equals
the current entering or leaving the parallel section.

8. DIRECT CURRENT
▶ In a direct current the electrons flow in one direction only.

9. ALTERNATING CURRENT
▶ In an alternating current the direction of flow reverses regularly.
▶ The number of complete alternations or cycles in 1 second is the
frequency of the alternating current. Its unit is hertz.