Current Electricity and Magnetism

Electricity: 

• The flow of electric charge which can be transported from one place to another place using conducting wire.

Current:

• Current is defined as the flow of charge per unit time.
• Current(I)=Charge(q)/time(t)
• SI unit of  Current= Ampere(a)
• SI Unit of Charge= Coulomb(c)

Symbol used in electricity:

Closed Circuit:

• The circuit in which current can flow from one point to another point is called close circuit.
• In closed circuit switch is kept on.

Open circuit:

• The circuit in which current cannot flow from one point to another point is called open circuit.
• In open circuit  switch is kept off.

Resistance(R):

• The opposition to the flow of current is called Resistance.
• Its SI unit is Ohm.

Electromotive Force(EMF):

• The energy required to move a charge from one terminal to another terminal in a cell of a circuit is called Electromotive force.
• Its SI unit is Volt(V).

Potential Difference(pd):

• The energy required to move a charge from one point to another in a circuit is called Potential difference.
• It is alco measured in Volt(V)

Types of Connection of Resistance:

1. Series connection of Resistance:

•  When resistor are connected in end to end position then the connection is called Series Connection.
• Total voltage is increased.
• Less chance of damage due to heating.
• If one of the loads doesn't work then all other loads fail to work.
• Separate switch cannot be used. 

      2.Parallel connection of Resistance:

• When all negative terminals are joined together at a point and all positive terminals are joined at other point and then negative and positive terminals are combined, then the connection is called Parallel connection.
• If one of the loads us not working then also the other loads continue to work.
• Separate switches can be used.
• Voltage cannot be increased.
• High chance of damaging due to heat.

Ohm's law:

• It state that the electric current passing through a conductor is directly proportional to the potential difference across its two ends at a constant physical condition.

Ammeter:

• It is a device used to measure electric current.

Voltmeter:

• It is a device used to measure ENF and potential difference.

1 Unit:

• The energy consumed by electrical device of power one kilowatt while running for 1 hour is 1 unit.

Electricity: 

• The flow of electric charge which can be transported from one place to another place using conducting wire.

Current:

• Current is defined as the flow of charge per unit time.
• Current(I)=Charge(q)/time(t)
• SI unit of  Current= Ampere(a)
• SI Unit of Charge= Coulomb(c)

Symbol used in electricity:

Closed Circuit:

• The circuit in which current can flow from one point to another point is called close circuit.
• In closed circuit switch is kept on.

Open circuit:

• The circuit in which current cannot flow from one point to another point is called open circuit.
• In open circuit  switch is kept off.

Resistance(R):

• The opposition to the flow of current is called Resistance.
• Its SI unit is Ohm.

Electromotive Force(EMF):

• The energy required to move a charge from one terminal to another terminal in a cell of a circuit is called Electromotive force.
• Its SI unit is Volt(V).

Potential Difference(pd):

• The energy required to move a charge from one point to another in a circuit is called Potential difference.
• It is alco measured in Volt(V)

Types of Connection of Resistance:

1. Series connection of Resistance:

•  When resistor are connected in end to end position then the connection is called Series Connection.
• Total voltage is increased.
• Less chance of damage due to heating.
• If one of the loads doesn't work then all other loads fail to work.
• Separate switch cannot be used. 

      2.Parallel connection of Resistance:

• When all negative terminals are joined together at a point and all positive terminals are joined at other point and then negative and positive terminals are combined, then the connection is called Parallel connection.
• If one of the loads us not working then also the other loads continue to work.
• Separate switches can be used.
• Voltage cannot be increased.
• High chance of damaging due to heat.

Ohm's law:

• It state that the electric current passing through a conductor is directly proportional to the potential difference across its two ends at a constant physical condition.

Ammeter:

• It is a device used to measure electric current.

Voltmeter:

• It is a device used to measure ENF and potential difference.

1 Unit:

• The energy consumed by electrical device of power one kilowatt while running for 1 hour is 1 unit.

Magnetism:

• Magnetism is the force exerted by magnets when they attract or repel each other.
• Magnetism is caused by the motion of electric charges.
• Magnets attract ferromagnetic materials.
• The magnet's similar poles repel each other, whereas the opposite poles attract one other.
• A hung magnet always comes to rest facing north-south.
• The magnet's poles are arranged in pairs.
• If a magnet brakes it creates new north or south pole.