- #1
Femme_physics
Gold Member
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This is a question that was on my test
http://img269.imageshack.us/img269/5125/circuitthingy.jpg
In the circuit in the drawing switch S is open. Both resistors are idential, both having resistance R each. Given the source is E, and R = r (the resistance of the voltage source). The ammeter resistance is negligible.
Closing the switch
A) Will the ammeter's reading go up, down, or won't change? Base your answer on a physical consideration or prove it by calculation.
((There were several questions but I'll just start with A for now))
The ammeter's reading decreases since there is more resistance.
Proof
http://img543.imageshack.us/img543/1949/ianswer.jpg
Homework Statement
http://img269.imageshack.us/img269/5125/circuitthingy.jpg
In the circuit in the drawing switch S is open. Both resistors are idential, both having resistance R each. Given the source is E, and R = r (the resistance of the voltage source). The ammeter resistance is negligible.
Closing the switch
A) Will the ammeter's reading go up, down, or won't change? Base your answer on a physical consideration or prove it by calculation.
((There were several questions but I'll just start with A for now))
The Attempt at a Solution
The ammeter's reading decreases since there is more resistance.
Proof
http://img543.imageshack.us/img543/1949/ianswer.jpg
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