# Homework Help: Ohm's law

1. Feb 4, 2008

### helpasap

I need help with this question... The manufacturer of a 12V car headlight specifies it will draw a current of 6A. You would like to check this claim with an ammeter designed to measure currents up to 10A and having a resistance of 0.1 Ohms. Which of the two figures below represents a circuit where the ammeter correctly measures the current in the headlight?

File size:
236.2 KB
Views:
96
2. Feb 5, 2008

### catkin

The diagram shows an voltmeter, not an ammeter ... ?

Ignoring that (assuming the voltmeter is an ammeter) what are your thoughts on the question?

3. Feb 5, 2008

### timon

if you cant answer this by yourself you haven't made any effort.

4. Feb 5, 2008

### rock.freak667

Uhm....Voltmeters and ammeters are different things. But taking that the voltmeter is an ammeter. How do junctions affect currents and pd's ?

5. Feb 5, 2008

### TVP45

Maybe he meant to put a 0.1 Ohm shunt across the Voltmeter. That turns it into an ammeter.