Electricity and Circuits

What is Electricity

Every atom is bounded by a nucleus that is composed of protons and neutrons. Both protons and neutrons are bonded by each other by nuclear force. The nucleus is surrounded by electrons. The nucleus and electrons are bonded by electromagnetic force.

What is current electricity.

An electrical current is a flow of electric charge, usually carried by electrons in an electrical circuit. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.

What is Static Electricity

Static electricity is an stationary charge, mostly produced by friction, causing a spark which then attracts dust or loose hair.

Ohms Law

What is Ohms Law?

Ohm's Law deals with the relationship between voltage and current in an ideal conductor.

What does V, R and I stand in Ohms Law?

In Ohms Law, V stands for voltage, while R stands for resistance and I stands for current.

Voltage (V) = Current x Resistance (I x R).

What's the relation between the 3?

At a constant temperature, the electrical current flowing through a fixed linear resistance is directly proportional to the voltage applied across it, and also inversely proportional to the resistance.

What Happens if V increases and R is constant--------

Then the current through the conductor also increases.

What happens when R increases and V is constant--------------

Then the current through the conductor decreases.

What are the 5 parts that make up a circuit?

1)Power Source: Electricity

2)Conduit: A tube or trough for protecting electric wiring.

3)Power Switch: An on and off button

4)Power Load: The part of a output used in power plants used for operations of motors or heating devices

5) L.E.D: Light-Emitting-Diode

Why do we need resistors?

A resistor is used to limit the current flowing in a circuit. Without, a resistor the circuit will damage the circuit and shorten it out.

The difference between a single series and parallel circuit

A series circuit is a circuit in which resistors are arranged in a chain, so the current has only one path to take. The current is the same through each resistor. The total resistance of the circuit is found by simply adding up the resistance values of the individual resistors.

A parallel circuit is a circuit in which the resistors are arranged with their heads connected together, and their tails connected together. The current in a parallel circuit breaks up, with some flowing along each parallel branch and re-combining when the branches meet again. The voltage across each resistor in parallel is the same.

The Difference between Conductor and Insulator

CONDUCTOR: those objects which can pass electricity through them is known as conductors. the conductors can pass electricity through them due to free electrons present in them. for example: iron, copper, aluminium etc.
INSULATOR: those objects which can not pass eletricity through them is called insulator. the insulators can't pass electricity due to less or absence of free electrons. for example paper, wood, rubber etc.

The differences between conventional current and actual current flow

Electrons are negative and flow from negative to positive. 'Conventional' current flow is from positive to negative. This is because early researchers in electricity thought electricity flowed from positive to negative, which is why they called them that in the first place.

Test.

a device having a designed resistance to the passage of an electric current.

An electromotive force or potential difference expressed in volts.

An electrical current is a flow of electric charge, usually carried by electrons in an electrical circuit. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.


Voltage is electric potential energy per unit charge, measured in joules per coulomb ( = volts).

1)Power Source: Electricity

2)Conduit: A tube or trough for protecting electric wiring.

3)Power Switch: An on and off button

4)Power Load: The part of a output used in power plants used for operations of motors or heating devices

5) L.E.D: Light-Emitting-Diode

A series circuit is a circuit in which resistors are arranged in a chain, so the current has only one path to take. The current is the same through each resistor. The total resistance of the circuit is found by simply adding up the resistance values of the individual resistors.

A parallel circuit is a circuit in which the resistors are arranged with their heads connected together, and their tails connected together. The current in a parallel circuit breaks up, with some flowing along each parallel branch and re-combining when the branches meet again. The voltage across each resistor in parallel is the same.