(Physics) True or False? <Sorry for posting another thread>

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.

DiamondBar

Full Member
10+ Year Member
Joined
Aug 23, 2009
Messages
121
Reaction score
7
Sorry, I should've included this on my other thread.

Will adding a voltmeter to the wire increase the resistance of a closed circuit system?

Answer: True

Doesn't adding a voltmeter form parallel resistor with a closed circuit? I googled a picture of it and it looked the way I imagined it would.
There is no drawing or any additional information for this problem. My mind automatically assumed that there was a resistor, so I pictured myself applying a voltmeter on both ends of the wire near the end of the resistor. I know that the voltmeter probably has resistance itself, so doing the calculations, 1/R1 + 1/R2 = 1/R total, shouldn't the total resistance should be lowered?




Sorry if this is a dumb question, I'm horrible in physics.
 
Voltmeters are typically added in parallel to the element (such as a resistor) that one wants to measure the voltage across. In which case, yes, the total resistance would drop. That said, although it is confusingly asked, the question makes it sound as though the voltmeter may be added in series with existing elements, in which case the resistance would go up.
 
Voltmeters are typically added in parallel to the element (such as a resistor) that one wants to measure the voltage across. In which case, yes, the total resistance would drop. That said, although it is confusingly asked, the question makes it sound as though the voltmeter may be added in series with existing elements, in which case the resistance would go up.


I guess it's the question that's confusing ><.
Thank you! I thought it I was missing something, but I guess not 😛
 
Top