Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Question
Chapter 29, Problem 6PLA
To determine
The nominal value of the resistor and the precision of this value.
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Make a VIRP table and complete it by measuring the voltage across each resistor and the power supply and measuring the current through each resistor and the total current and the total power coming out the power supply. Set your power supply to 12 V.
Provide evidence that your table information is reasonable. Write down your reasoning and show your calculations.
Figure A
R1 = 100 Ω
R2 = 90 Ω
R3 = 105 Ω
NOTE: only focus in writing the reasoning of the calculations. Put them into words. Thank you!
Express answer/s in mks (SI) .
Draw diagram whenever necessary
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, varioble, word, etc. All numerical answers
should be in three significant figures.
R1
R2
R3
(A)
First we calculate the current across each resistor. From Ohm's law, we arrive at a general formula for current:
1= v
R
Plugging in values, the current across the resistor R1 is equal to: (Please note that the current is in milliamperes)
1 = eeec0os
Similarly the current across R2 is:
mA
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