Resistor X

[MrPandaram]

ELLO ALL.. kinda stuck.... if anyone care to help me out?

Q is.....
two resistors of X ohms and 4 ohms are connacted in series to 20 V d.c supply.
if the p.d across the X ohms is 4V, determine....

1,the p.d across the 4 ohm resistor..
2,the current taken by the supply..
3,the value of resistor X..
4,the power taken by the circuit..


anyone intrested in explaining this poo out to me?

thanks

 

[silva.foxx]

ELLO ALL.. kinda stuck.... if anyone care to help me out?

Q is.....
two resistors of X ohms and 4 ohms are connacted in series to 20 V d.c supply.
if the p.d across the X ohms is 4V, determine....

1,the p.d across the 4 ohm resistor..
2,the current taken by the supply..
3,the value of resistor X..
4,the power taken by the circuit..


anyone intrested in explaining this poo out to me?

thanks

1. total V d.c supply minus p.d across X ohms equals ______ v
2. I'd expect the value of X to be calculated before you can provide a current value. So get 1. correct first then we'll move on.

.

 

[Marvo]

It's often easier to visualize and understand if you draw it so here's a quick sketch.


​

 

[Marvo]

Sorry, I didn't see SilvaFoxx was taking you step by step.

 

[telectrix]

duplicate post

 

[telectrix]

i workeed it this way. vd across 4ohm is 20-4=16, threefore I = V/R = 16/4 = 4A. then X=V/I= 4/4 =1ohm. then power dissipates P=Vx I =80watts.

 

[silva.foxx]

The OP will never learn if spoon fed his answers for tomorrow morning's hand-in.

 

[topquark]

I didn't understand where the poo came into it so thought it was a wind up.

 

[telectrix]

wind up resistors now. whatever next.

 

[topquark]

Clockwork pots

 

[MrPandaram]

thanks guys... i am just starting out..

i just couldnt work it out.. but i understand now.. it was there... but kinda brain freeze..

thanks for the pic marvo.. very helpful.. i done other few Q myself after seeing your photo..

 

[MrPandaram]

1, 20-4=16V dc

2, I=U/R=16/4=4A

3,Rx=U/I+4/4=1R

4,P=I square x R=4 square x 5 =80W

 

[silva.foxx]

thanks guys... i am just starting out..

i just couldnt work it out.. but i understand now.. it was there... but kinda brain freeze..

thanks for the pic marvo.. very helpful.. i done other few Q myself after seeing your photo..

The bloody 'photo' gave you the answers(!)... so how did you do them? :nonod:

.

 

[Knobhead]

One of the rules of an international engineers site I’m a member of is:
THIS IS NOT A HOMEWORK SITE.

You will never learn if we give the answers on a plate.

 

[Knobhead]

Rant over :83: