Activity 19 Essay

2.) Attach the Crocodile clips from the PSU to the ammeter and motor as shown above in the labelled diagram, making sure the voltmeters clips are attached to the motor.

I used a short glass and taped the photocell to it. I attached the DMM to the photocell and set the meter to ohms. I only separated all the parts of the experiment by 10cm. I then flashed the light through the filters and measured the DMM every 15degrees. I did this until the filter was flipped 360 degrees.

3. Electrons are small and are negatively charged (-) with a mass of almost 0 amu..

· I set up the apparatus as shown in the diagram. I then placed a

1) Three equal point charges are placed at three of the corners of a square of side d as

After loading the gel, I connected the red and black wires from the Power Unit so electrophoresis could begin.

d. The RC time constant increases as the capacitor value decreases, increases the voltage variations

Each of the newly exposed chambers contains one battery cell, filled with a solution of sulphuric acid which evaporates over time. Top up this solution with the de-ionised water, covering the lead plates visible within the cells. Leave the covering cap off the battery and connect your 6 amp charger, leaving the battery to charge for several hours. Replace the cap, test again with the voltmeter, and a more healthy reading is your

A magnetic field is produced in the region around a wire whenever a current flow through that wire. Magnetic fields are vector fields, they have a direction and magnitude. The formula for the magnitude of the magnetic field from a wire is B=(µ_O I)/2πr. B is the magnetic field, µ_O is the permeability of free space (4πx〖10〗^(-7)Tm/A), I is the current, and r is the distance from the field sensor to the rod. In part 1A and 1B we constantly turn off the power source and ammeter after each run to eliminate the strongest magnetic field, earth. In graph 1, the best fit is a linear line. The graph corresponds to the expression of the magnitude of the magnetic field in a current carrying wire when there is a change in current because the magnetic

Question 21.2 A positively charged insulating rod is brought close to an object that is suspended by a string. If the object is attracted toward the rod, we can conclude: a. The object is positively charged. b. The object is negatively charged. c. The object is an insulator. d. The object is a conductor. e. None of the above

Comparing this to the reported value of 9x10-5, the experimental value is much higher. Reasoning for this could be due to inaccuracy of the instruments used or from using different procedures. Discussion Part II Question Three I2 + 2e- 2I- Eo= 0.622V As3+ 2e- + As5+ Eo= -0.56V As3+ + I2 As5+ + 2I- Overall, Eo is 0.622V – 0.56V = 0.062V Because this value is positive, the reaction will run spontaneously. This means that the reaction could be titrated by coulometry.

Touch the two leads of the multimeter together after each measurement and record the reading error.

1. Practice shooting the Gauss rifle so that you can place the plastic box at the correct distance for accurate measurements. The experiment will look something like the first diagram (found on page 13).

After that I adjust the positive variable supply (V6) for voltage reading equal to that of V5 then I measure the potential difference between positive terminals of V5 and V6. The meter indicated me near zero because circuit batteries were series-opposing. Then I adjust V6 for

Pull-down concept:- Now pull-down concept and pull-down resistor works in the same way as in pull- up concept but the resistance is connected to ground. It holds the logic signal near zero volts when the two probes are open circuited.