* An electric current is a flow of electric charge
or the amount of charge flowing through a given cross section of a material in
* Conventional current is in the direction
opposite to electron flow.
* One ampere is defined as the flow of electric
charge across a surface at the rate of one coulomb per second.
* An electric cell is something that provides
electricity to different devices that are not fed directly or easily by the
supply of electricity
* A dry cell is a portable form of a leclanche
* Batteries are a collection of one or more cells
whose chemical reactions create a flow of electrons in a circuit
* The cell is the basic single electrochemical
unit which converts chemical energy to electrical energy.
* Ammeter — An instrument for measuring the flow
of electrical current in amperes. Ammeters are always connected in series with
the circuit to be tested.
* Ampere (A) — A unit of measure for the intensity
of an electric current flowing in a circuit. One ampere is equal to a current
flow of one coulomb per second.
* Circuit — A closed path in which electrons from
a voltage or current source flow. Circuits can be in series, parallel, or in
any combination of the two.
* Current (I) — The flow of an electric charge
through a conductor. An electric current can be compared to the flow of water
in a pipe. Measured in ampere.
* Fuse — A circuit interrupting device consisting
of a strip of wire that melts and breaks an electric circuit if the current
exceeds a safe level.
* Conductor — Any material where electric current
can flow freely. Conductive materials, such as metals, have a relatively low
resistance. Copper and aluminum wire are the most common conductors
* Insulator — Any material where electric current
does not flow freely. Insulation materials, such as glass, rubber, air, and
many plastics have a relatively high resistance. Insulators protect equipment
and life from electric shock.
* Parallel Circuit — A circuit in which there are
multiple paths for electricity to flow. Each load connected in a separate path
receives the full circuit voltage, and the total circuit current is equal to
the sum of the individual branch currents.
* Series Circuit — A circuit in which there is
only one path for electricity to flow. All of the current in the circuit must
flow through all of the loads.
Circuit — When one part of an electric circuit comes in contact with another
part of the same circuit, diverting the flow of current from its desired path.
* One unit
of coulomb is charge of approximately 6.242×1018 protons or electrons.
* The potential difference between any two points
is the amount of energy needed to move one unit of electric charge from one
point to the other.
* Electrical conductivity or specific conductance
is the measures a material’s ability to conduct an electric current
resistivity is the property of a material that quantifies how strongly that
material opposes the flow of electric current.
* The sources which produce the small amount of
electricity for shorter periods of time is called as electric cell or electro
*Electrolytes: A substance that dissociates into
ions in solution and acquires the capacity to conduct electricity. Sodium,
potassium, chloride, calcium, and phosphate are examples of electrolytes.
activity helps the students to understand about the Parrellel and series
Type the URL link given below in the browser or scan the QR code. A page opens
with a battery , some cables, two sets for circuit and two bulbs.
Ask the students to fix the wires to the battery and the circuit
Let the students do it and understand the concept with different combinations
are indicative only
requires, allow Flash Player or Java Script to load the page.