How Six 2V lamps could be lit to their normal brightness.

[Meezus]

Homework Statement

[/B]

Homework Equations

The Attempt at a Solution

I'm not really sure how to attempt this question tbh. In order for the lamps to have normal brightness I think the circuit must be parallel. I also think maybe for A there can only be one lamp per branch because there's only 2V available, for B there can be 3 per row and for C it can just be series? [/B]

 

[stockzahn]

Your attempt seems to be correct.

 

[Meezus]

Your attempt seems to be correct.

Thank you :D I guess I did know haha. Any chance you could help with this?

a) I know how to draw the circuit.
b) I'm completely stuck on B. I'm guessing it involves omhs law but I can't see where.
c) I can answer C with Potential difference (V) = current (I) x resistance (R).
d) I'm not sure how to work out this.

 

[haruspex]

Thank you :D I guess I did know haha. Any chance you could help with this?

a) I know how to draw the circuit.
b) I'm completely stuck on B. I'm guessing it involves omhs law but I can't see where.
c) I can answer C with Potential difference (V) = current (I) x resistance (R).
d) I'm not sure how to work out this.

What is the p.d. across X?

 

[Meezus]

What is the p.d. across X?

Potential difference (V) = current (I) x resistance (R)

Potential difference (V) = 2 x Resistor X?

 

[stockzahn]

Thank you :D I guess I did know haha. Any chance you could help with this?

a) I know how to draw the circuit.
b) I'm completely stuck on B. I'm guessing it involves omhs law but I can't see where.
c) I can answer C with Potential difference (V) = current (I) x resistance (R).
d) I'm not sure how to work out this.

Yes, we'd like to help you with this, but at first please start a new thread with this problem. According to the forum rules only one problem should be discussed in each thread.

 

[Meezus]

Potential difference (V) = current (I) x resistance (R)

Potential difference (V) = 2 x Resistor X?

Ok thank you :) I created new thread

https://www.physicsforums.com/threa...rent-supplied-battery-working-out-p-d.843612/

 

[Meezus]

What is the p.d. across X?

Was told to create a new thread as it is a new questions :)

https://www.physicsforums.com/threa...rent-supplied-battery-working-out-p-d.843612/