Please be as thorough as possible. Thanks! Current balance Questions: 1. What is
ID: 1836916 • Letter: P
Question
Please be as thorough as possible. Thanks! Current balance Questions:
1. What is the physical significance of the intercept of the line you fitted to the weight versus I2 plot?
2. Why didn’t we have to take the magnetic field of the earth (or any of the various “stray” fields in the room) into account when computing a value for the vacuum permeability?
3. Assuming that the digital multimeter rounds correctly (and does not merely truncate the displayed number to fit on the screen), compare the relative uncertainty in your I2 values to the relative uncertainty in the geometrical term L/a. Use an uncertainty of 5 in the first digit not displayed as the uncertainty in the digital reading. That is, a reading of 1.23 would have an uncertainty of 0.005.
4. Which will have the greater effect on your experimental results, the precision of the multimeter, or the precision of the tape (or meter stick) used to measure D?
5. Based on the uncertainty in your experimental value for the permeability constant and your reported value, can you say that your result is in agreement with the accepted value to within your experimental uncertainty?
Explanation / Answer
1) the physical significance of weight vs I2 plot being a straight line verifies amperes law which states that magnetic field around current carrying wire is proportional to the current in the wire .
the expression is W = k I2 where I is current flowing throuh both the wire.