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Pupil
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posted by  princessyasmin on 9/22/2008 4:51:13 PM  |  status: Live  

multiple choice..will rate LIFESAVER .please help

Course Textbook Chapter Problem
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Question Details:
5. [1pt]
Two resistors are in parallel as shown in the figure. The equivalent resistance of the two resistors is


A) the same as the average resistance.
B) bigger than the individual resistors.
C) smaller than either of the two resistors.
D) the same as if the two resistors were in series.


6. [1pt]
If the applied voltage is the same, compared to having only one of these resistors in the circuit, the current in the circuit with two resistors in the circuit is...

A) smaller than the current in the circuit with one resistor.
B) bigger than the current in the circuit with one resistor.
C) the same as the current in the circuit with one resistor.
D) the same as if the two resistors were in series.
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Sage
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posted by Chaosriders on 9/22/2008 5:06:53 PM  |  status: Live
Asker's Rating: Lifesaver   
princessyasmin's comment:
"#6 was wrong"
Response Details:
5.  the answer is C
because the Equivalent resistance in parallel is (R1*R2)/(R1+R2)

6.  the answer is C
the current flows in the two parallel resistors is the same as the current flows into one resistor.
for example, if you have 2 A of current going in the circuit with one resistor then that resistor will see that whole 2 A but if with two parallel resistors than that current will divided up.  In both case the current will add up to 2 A.
"to be smart, one has to realize oneself as not smart"    by Chaosriders

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