Series circuit connected to a d.c power supply of 12volts
R1 300ohms
R2 480ohms
R3 220ohms
is the total resistance 1000ohms?
is the total circuit supply current, 12/1000=0.012A?
the potential difference in volts across EACH resistor?
R1 300*0.012=3.6v?
R2 480*0.012=5.76v?
R3 220*0.012=2.64v?
3.6+5.76+2.64=12v?
Parallel circuit connected to a d.c power supply of 12volts
how do i calculate the total circuit resistance?
is it 300+480+220=1000ohms?
how do i calculate the total circuit supply current?
is this how to calculate the current through each resistor?
12v/300=0.04A
12v/480=0.025A
12v/220=0.054A
total= 0.119A?
2006-12-08 01:59:25 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
The total resistance for parallel resistors is 1 divided by the sum of the the reciprocals of all resistors --
1 / (1/r1 + 1/r2 + 1/r3) or just take 12 volts and divide it by the current you calculated and you have the equivalent resistance. Part 1 is correct.
http://www.physics.uoguelph.ca/tutorials/ohm/Q.ohm.intro.parallel.html
2006-12-08 02:10:31 · answer #1 · answered by Gene 7 · 0⤊ 0⤋
You're on a roll! For parallel resistances, the reciprocal of the total resistance is the sum of the reciprocals of the individual resistances. In your last example, you essentially calculated the reciprocals by finding the current through each resistor. Now, just add the currents up and divide that sum into the 12 V supply to find the parallel resistance.
2006-12-08 02:09:37 · answer #2 · answered by hevans1944 5 · 0⤊ 0⤋
In series the total resistance is always the sum of the resistances. So yes 1000 ohms.
Formula always Volts / (Amps x resistance) for series circuit.
The total voltage drop = total voltage and is proportinal to the resistance in series.
parallel resistors. hint : total resistance is less than the smallest resistor.
1/r1 + 1/r2 + 1/r3 : and thats it.
you know the rest
2006-12-08 02:12:47 · answer #3 · answered by philip_jones2003 5 · 0⤊ 0⤋
i think you are right (without looking too closely) this will work with resistors in parallel with the load. problem arises when you have 2 in parallel and 1 in series, you need to first calculate parallel resistance then total series resistance
formula = 1/R1+1/R2=1/Rtotal
2006-12-08 02:42:10 · answer #4 · answered by Mark G 2 · 0⤊ 0⤋
You are describing a Scalextric, aren't you?
2006-12-08 02:08:16 · answer #5 · answered by Anonymous · 0⤊ 0⤋
google RESISTANCE CALCULATOR
2016-03-28 23:10:06 · answer #6 · answered by Anonymous · 0⤊ 0⤋