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Circuit Connection
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- A copper wire (µ = 1.256x10^-6 T-m/A) was used in a solenoid wire of 1000 turns in 20cm of solenoid length in order to generate 2 Tesla of B-field, How much current is required? choices: a. 3.14 mA b. 318.47 A c. 3,184.7 A d. 314 mAThe following are possible ways to express the quantity 0.492 (Give ALL correct answers, i.e., B, AC, BCD...)A) 0.00492E3B) 0.000492E4C) 49.2E-4D) 0.0492E+1E) 0.492E+2F) 4.92E-1The main equation we are using to measure the e/m ratio is: (e/m)=((2v)/(r2B2)) If the anode voltage V is increased by 4 times and the magnetic field was kept constant, the electron beam's deflection radius will be doubled. If we plot V as the y-axis and r2 as the x-axis the slope is equal to: A) (e/m)B2=slope B)(e/m)=slope C)(e/m) (B2/2)=slope
- A resistor composed of carbon =(p=3.5*10^5 Ω*m) having a radius of 1.2mm and a length of 3.1mm is connected to a 6V batter. How much energy is dissipated by the resistor in 5 minutes?Let the figure (Figure 1) represent a strip of an unknown metal with z1z1=11.8 mmmm and y1y1=0.23 mmmm. When the magnetic field is 2.29 TT and the current is 78.0 AA, the Hall emf is found to be 131 μVμV. What does the simplified model of the Hall effect give for the density of free electrons in the unknown metal?How much work is needed to carry an electron from the positive terminal to the negative terminal of a 9.0-V battery. (e = 1.60 × 10-19 C , melectron = 9.11 × 10-31 kg) Group of answer choices 17 × 10-19 J 14.4 × 10-19 J/C 14.4 × 10-19 J 9.0 J 1.6 × 10-19 J
- How much work is needed to carry an electron from the positive terminal to the negative terminal of a 9.0-V battery. (e = 1.60 × 10-19 C , melectron = 9.11 × 10-31 kg) *my incorrect answer was: 14.4 × 10-19 J/Cas part of a lecture demonstration, a physics professor plans to hold an ununsulated current carrying wire in her hands. For safety sake, the potential differnece between her hands is to be no more that 1.50v. She holds her hands 1.20m apart, with the wire stretched tightly between them. The wire is to carry 6.00 A of current and is to be made of aluminum. What is the minimum wire radius that is consistent with safety? p for aluminimum = 2.75 x 10 -8 omega-mIn the Bohr model of the hydrogen atom, an electron in thelowest energy state moves at a speed equal to 2.19 x 106 m/sin a circular path having a radius of 5.29 x 10-11 m. What isthe effective current associated with this orbiting electron?
- A 0.50 T magnetic field is applied to a paramagnetic gas whose atoms have an intrinsic magnetic dipole moment of 1.0* 10^23 J/T. At what temperature will the mean kinetic energy of translation of the atoms equal the energy required to reverse such a dipole end for end in this magnetic field?(known values: e = 1.602 E-19 C, m= 9.11E-31 kg) e/m(theoretical)= 1.759*1011 Use the data provided to make an experimental prediction for e/m. Find a way to plot the data such that your e/m prediction is given by the slope of a line. (The coils have radius R=0.15m, and 130 wire turns (N=130)) Current (A) Voltage (V) Beam Radius (m) 2.25 500 0.04 1.27 300 0.055 1.36 200 0.04 1.63 400 0.05 2.27 300 0.03 2.19 200 0.025 2.97 500 0.03 1.54 300 0.045 1.79 200 0.03 2.01 400 0.04 0.99 200 0.055At room temperature, What is the strength of the electric field in a 12-gauge copper wire with a diameter of 2.05mm that is needed to cause a 2.75A current to flow? What field would be needed if the wire were made of silver instead?
