Series and Parallel Combination of resistors
What is a Resistor and Resistance.
The resistor is any material that opposes the flow of electrons in a circuit. Resistance is the property of a material to oppose the flow of electrons. All the metals have some resistance. Silver is the best conductor and second is copper.
The unit of resistance is ohm named after the German scientist George Simon Ohm.
What factors affect the Resistance?
The resistance of depends on the following physical factors:
Length(l)
Cross-Sectional Area(A)
The type of material.
Inside a material there there are free electrons in random motion. When a battery is connected in closed ciruit electrons start moving from negative to postive teminal. There are lage numer of electrons, billions and billions of electrons, are in motion. They are in frequent collision with each other. Due to this they loose there energy and speed. If the path is small the will face less collision before reaching the positive terminal. In case the length increases they take longer time to reach on the positive terminal. You can compare the motion of electrons in material with a vehicle in motion and restiance of material as traffic on the road. If the traffic is long vehicle will take longer time to come out compared to small length of traffic.
Resitance is directly proportional of length.
If the wire is thick then electrons have more space to flow. It is similar to vehicles moving on wide road. More area less resistance.
Resitance is inversely proportional of cross sectional area.
The fourth factor is temperature. The resistance of a metal is also affected by its temperature.
Series combination of resistors
In a series combination of resistors, one end of the register is connected with the end of another register and the second end of the resistor is connected with the third resistor.
It means in series combination, only one end of the resistor is connected with another end of the resistor and the remaining end is free to connect with power supply.
In series combination, the current remains the same for a particular combination of resistors the total voltage in the circuit gets divided across the registers, but the sum of voltage always remains constant and this sum is equal to the potential of power supply.
Parallel combination of resistors
In parallel combination, both ends of the registers are connected with both ends of any other resistor.
In parallel combination, The voltage remains constant across the resistors but the current flowing in the circuit gets divided into the resistors. But the sum of the total current remains the same in the circuit.
What type of electric connections are used in our home, series or parallel ?
Appliances in our home are connected in parallel because each appliance kids fixed voltage and current depending on there is a reading this makes a appliance work efficiently.
Series form is not used for general purpose connection because correct in series form remains same and voltage gets divide between resistors / appliances. So, the appliances do not work properly. Some may get more current and others less this can damage the appliance.
In series for me for one appliance breaks then others also stop working because it breaks the circuit but in parallel form if one appliance breaks others work normally without any effect.
