Can anyone tell me wot parallel and series resistances are??

Question

in physics , realted to current electricity and associated stuff

Answer 1

For series, Req = R1 + R2 + R3 + R4... + Rn

For parallel, 1/Req = 1/R1 + 1/R2 + 1/R3 + 1/R4 .... + 1/Rn

Answer 2

Visualize a string of ten Christmas tree lights plugged into an electrical source with all the lights lit. When a single light fails on the string, all ten go off. The lights are in series Resistance.
Any one failure breaks the entire circuit.

The lights are in parallel resistance when if any individual light fails all the others stay lit. This occurs when the single power source provides current to each light individually.

Answer 3

I assume you know what resistors are. Although I talk about start and end of a resistor it doesn't really have a start or an end, the direction it is used in doesn't matter, it's just to identify the connections.

If you connect them is series, you just connect them in a long chain. So, the end of one is connected to the start of the next etc. like a daisy chain. If the resistors were people, they would join right hand to left hand and then on to the next person in a long line. This increases the resistance by adding them all together to get the total resistance.

If you connect them in parallel, you connect them all together so that all the start ends are connected together on one terminal and then all the ends are connected together on the other terminal. If the resistors were people, they would join all their right hands together and all their left hands together. This decreases the resistance but the formula is slightly more complicated.

1/Total Resistance=1/Resistor1+1/Resistor2+.........

The reference does it much better as it uses diagrams and images.

Answer 4

In a series connection, if one of your resistances went out (broken) you will have an open circuit but not in parallel.

In a series connection, the total current in the circuit is the same same as the individual resistance while in parallel circuit the total current is the sum of the individual resistances.

In a parallel circuit the voltage across the supply is the same as across each resistances but in a series circuit the voltage across the terminals of your power supply is the sum of the required voltages of the individual resistances.

Resistances are loads in a circuit. They are the users of the currents. If your resistance(load) is very high as compared to your power supply your circuit will burn due to over current.

Answer 5

The first answer is correct...those equations are useful for coming up with total resistance. But in case your question was a bit more fundamental...

Resistances in series are connected one after the other, like links in a chain. Diagramatically: +---R---R---R---+, where the R's are the resistors, --- is wire, and + are terminals.

Resistances in parallel are connected to the same terminal points on both ends of the resistors. Diagramatically:

/---R---\
+---R---+ ; where / and \ are also wires.
\---R---/

One of the major points to note is that when resistors are hooked up in series, total resistance between the terminals goes up with each new resistor. When they are hooked up in parallel, total resistance between the terminals goes down.

Answer 6

In parallel:
-------------
- The intensity of electric current is the same in all resistors
- It is used to obtain a large total resistance from small ones
- The equivilane (total) resistance bigger than the resistance of any individual resistors

R = R1 + R2 + R3 + ............

If the resistors have the same resistances:
R(total) = Number of resistors * the resistance of one resistors
R = n*r


In series:
------------
- Potintial difference is same across all the resistors
- It is used to obtain a small total resistance from large ones
- The equivilant (total) resistance less than the resistance of any individual resistors

1/R = (1/R1) + (1/R2) + (1/R3) + ..........

If the resistors have the same resistances:
R(total) = the resistance of one resistor / number of resistor
R = r/n

i hope u got ur point from my explantion

Answer 7

I'll try,

a resistance does exactly that, it resists the flow of electricity,
if it is a light bulb, the resistance(filament) is a thin spot in the wire, forcing voltage through this thin spot will change the electrical energy into heat, which makes the filament hot. if there are two light bulbs in series, there will be twice as much resistance, and the bulbs will only get half as hot, and as a result, half as bright.

series: +------(bulb)-----(bulb)----- -

if in parallel, each bulb behaves as if it were the only bulb(it's just as bright), but the total resistance is cut in half, because there's twice as much filament available for the electricity to pass through

Parallel: ____(bulb)_____
+ -----------< ___(bulb)______>---------- -


Maybe not the most clear, but its the best I can do first thing in the A.M.

Answer 8

resistances can be connected in 2 ways
1)in such a way that the resultant R(resistance) increases(series)
2)in such a way that R decreases (parallel)
to be connected in series means that same amount of current flows thru all the resistances whereas to be connected in parallel means there is a common potential difference between them

Answer 9

resitance in parallel circuits are divided into the number of resistors. for series connections, each resistor receives the same amount of resistance..this is explained in the following formula

1 / R = 1 / R1 + 1 / R2 + 1 / R3 +...>>>>>>>> parallel

R = R1 + R2 + R3 +... series

Answer 10

at the same time as the resistors are linked in parallel the web resistance is given this equation : a million / R(internet) = (a million / R1) + (a million / R2) + (a million / R3) a million / R(internet) = a million/6 + a million/8 +a million/21 = 0.33 R(internet) = a million / 0.33 = 3.03 ohms