Similarly the current across R2 is: mA And the current across R3 is: 13 = mA The current read by the ammeter is the sum of the currents across each resistor: mA Alternatively we can solve for the current across the ammeter by firct calculating the eguivalent resistance and then anplving Ohm's

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter29: Direct Current (dc) Circuits
Section: Chapter Questions
Problem 64PQ: Ralph has three resistors, R1, R2, and R3, connected in series. When connected to an ideal emf...
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Similarly the current across R2 is:
mA
And the current across R3 is:
mA
The current read by the ammeter is the sum of the currents across each resistor:
1=h+/2 + !3
| =
mA
Alternatively, we can solve for the current across the ammeter by first calculating the equivalent resistance and then applying Ohm's law.
The equivalent resistance of the three resistors in parallel is:
1/Rag =1/R, +1/R, +1/
Thus,
Req
Transcribed Image Text:Similarly the current across R2 is: mA And the current across R3 is: mA The current read by the ammeter is the sum of the currents across each resistor: 1=h+/2 + !3 | = mA Alternatively, we can solve for the current across the ammeter by first calculating the equivalent resistance and then applying Ohm's law. The equivalent resistance of the three resistors in parallel is: 1/Rag =1/R, +1/R, +1/ Thus, Req
QUESTION 1
What is the current read by the ammeter in the circuit below? Let R1 = 1 kiloohm, R2 = 2 kiloohm, R3 = 3 kiloohm, and the emf of the ideal source is 5 volts.
Input R1, R2, and R3 for resistors R1, R2, and R3 respectively. Input E for the emf E. Use context clues to figure out if you need to input a numerical value, variable, word, etc. All
numerical answers should be in three significant figures.
R1
R2
R3
First we calculate the current across each resistor. From Ohm's law, we arrive at a general formula for current:
Plugging in values, the current across the resistor R1 is equal to: (Please note that the current is in milliamperes)
mA
Transcribed Image Text:QUESTION 1 What is the current read by the ammeter in the circuit below? Let R1 = 1 kiloohm, R2 = 2 kiloohm, R3 = 3 kiloohm, and the emf of the ideal source is 5 volts. Input R1, R2, and R3 for resistors R1, R2, and R3 respectively. Input E for the emf E. Use context clues to figure out if you need to input a numerical value, variable, word, etc. All numerical answers should be in three significant figures. R1 R2 R3 First we calculate the current across each resistor. From Ohm's law, we arrive at a general formula for current: Plugging in values, the current across the resistor R1 is equal to: (Please note that the current is in milliamperes) mA
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