# Question on circuit

Peter R

## Homework Statement

So here is a circuit question that I couldn't solve

V=IR

## The Attempt at a Solution

So I assumed that since the ammeter gives no reading it should lead to no potential difference in between those two points, then I'm completely stuck. Please help, the answer is D for reference:)

#### Attachments

Tom.G
Think in terms of what is necessary, even if it is not sufficient.

(Nasty question though!)

cnh1995
Homework Helper
Gold Member
So I assumed that since the ammeter gives no reading it should lead to no potential difference in between those two points,
Ok, so now you can remove the ammeter from the circuit. It won't make any difference.

So how are R1 and R2 connected? How are R3 and R4 connected?

Peter R
Think in terms of what is necessary, even if it is not sufficient.

(Nasty question though!)
Still have no clue man, a little more hint?

Peter R
Ok, so now you can remove the ammeter from the circuit. It won't make any difference.

So how are R1 and R2 connected? How are R3 and R4 connected?