In a millikan oil-drop experiment, the charges on several different oil drops were as follows: –5.92; –4.44; –2.96; –8.88. the units are arbitrary. what is the likely value of the electronic charge in these arbitrary units? for more background on the millikan oil-drop experiment, refer to section 2.4 in your textbook.

In this hypothetical experiment we found that the fundamental electronic charge is -1.48

Explanation:

Millikan's experiment aims to find the charges of different drops of oil, and to check in all the charges their entire multiples of a minimum elementary charge.

   Q = n q

   With Q the charge of the drop, n an integer (1, 2.3…), q the minimum elementary charge

We can try this hypothesis is easily dividing all the charges go the smallest

-4.44 = n (-2.96) ⇒ n = 1.5

 This value is not an integer, so the equation is not fulfilled, which implies that the elementary charge must be smaller than the minimum measured value, suppose then the minimum measured value is a multiple of the elementary charge, let's test with the smallest n = 2; in this case we have

  -296 = 2 q   ⇒      q = -296 / 2 = 1.48

To believe this, let's check that all charges have an integer multiple of this value  

 (-4.44) =n (-1.48)  

 n = 3

We create a table with all the charges to test this possible elementary charge

     Q            n

     -8.88      6

     -5.92      4

     -4.44      3

     -2.96      2

In this hypothetical experiment we found that the fundamental electronic charge is -1.48

In the Millikan's actual experiment, the elementary charge found was 1.6, it differs by less than 8% from that found in this hypothetical experiment.

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: