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5.3. A Hall effect device is used to measure the strength of an external magnetic field....
A Hall probe serves to measure magnetic field strength. Such a probe consists of a poor...
A Hall probe serves to measure magnetic field strength. Such a probe consists of a poor conductor 0.159 mm thick, whose charge-carrier density is 1.31 × 1025 m–3. When a 2.29-A current flows through the probe, the Hall voltage is measured to be 3.67 mV. What is the magnetic field strength?
I Review A Hall-effect probe to measure magnetic field strengths needs to be calibrated in a...
I Review A Hall-effect probe to measure magnetic field strengths needs to be calibrated in a known magnetic field. Although it is not easy to do, magnetic fields can be precisely measured by measuring the cyclotron frequency of protons. A testing laboratory adjusts a magnetic field until the proton's cyclotron frequency is 9.80 MHz . At this field strength, the Hall voltage on the probe is 0.547 mV when the current through the probe is 0.141 mA . Later, when...
3. A Hall effect probe to measure magnetic field strengths needs to be calibrated in a known...
3. A Hall effect probe to measure magnetic field strengths needs to be calibrated in aknown magnetic field. Magnetic fields can be very precisely measured by measuring thecyclotron frequency of protons. A testing laboratory adjusts the magnetic field until theproton’s cyclotron frequency is 10.0 MHz. At this field strength, the Hall voltage on theprobe is 0.543 mV when the current through the probe is 0.15 mA. Later, when anunknown magnetic field is measured, the Hall voltage for the same current...
A Hall probe is calibrated using a magnetic field B that causes protons to have a...
A Hall probe is calibrated using a magnetic field B that causes protons to have a cyclotron frequency fcyc = 9.7 MHz. At this field strength the Hall voltage is AVH= 0.570 mV when the current through the probe is / = 0.17 mA. The probe is then placed in another magnetic field B and the Hall voltage at the same current is measured to be AVH = 1.750 mV. What is the strength of the unknown magnetic field, B?...
A Hall effect probe used to measure magnetic fields is made with a copper bar of...
A Hall effect probe used to measure magnetic fields is made with a copper bar of thickness 2.50 μm . The conduction electron density of copper is 8.47x1028 m−3. Part A If the current in the bar is 440 mA , find the perpendicular magnetic field present when the Hall potential difference is 2.0 V . Express your answer to two significant figures and include the appropriate units. Part B If the current in the bar is 440 mA ,...
An electromagnetic flowmeter is to be used to measure blood speed. A magnetic field of 0.145...
An electromagnetic flowmeter is to be used to measure blood speed. A magnetic field of 0.145 T is applied across an artery of inner diameter 3.80 mm. The Hall voltage is measured to be 89.8 V. What is the average speed of the blood flowing in the artery? cm/s
Inside your smartphone is a small integrated circuit called a "Hall sensor" that measures the mag...
Inside your smartphone is a small integrated circuit called a "Hall sensor" that measures the magnetic field to fairly high precision. (It is actually made of three separate "Hal bars", to measure the field components in the r, y, and z directions). The Hall sensor acts like a compass for your phone, and assists in navigation and GPS apps. Let's assume each Hall bar is a strip that is 20 11m long, 5 ㎛ wide, and 1 μm thick. (a)...
30. The Hall-effect generator is constructed of a. N material 31. What three factors determine voltage...
30. The Hall-effect generator is constructed of a. N material 31. What three factors determine voltage amplitude produced by a Hall generator? a. Size of Hall generator b. Polarity of voltage applied c. Magnetic field strength b. P material (select all) d. Magnitude of current applied by source e. Temperature of Hall generator 32. What are two methods used to increase output signal from a Hall generator? use a diode across device b. use of concentrators (tuning) a. c. increase...
5. (2 marks) A balance can be used to measure the strength of the magnetic field....
5. (2 marks) A balance can be used to measure the strength of the magnetic field. Consider a loop of wire, carrying a precisely known current, shown in the figure, which is partially immersed (80 % of the total cross sectional area) in the magnetic field. The force that the magnetic field exerts on the loop can be measured with the balance, and this permits the calculation of the strength of the magnetic field. The short side of the loop...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in ...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in a circuit (unless it is using a current probe)? 2. Consider Figure 1. According to the calculations in the lab handout, if Z-1kΩ +/6914, then the phase difference (фи-фі) between u(t) and i (t) is 34.6". a. If this v(t) and i(t) were displayed on a DSO (v(t) being a node voltage and using a current probe for i(t) as shown in...
I Review A Hall-effect probe to measure magnetic field strengths needs to be calibrated in a known magnetic field. Although it is not easy to do, magnetic fields can be precisely measured by measuring the cyclotron frequency of protons. A testing laboratory adjusts a magnetic field until the proton's cyclotron frequency is 9.80 MHz . At this field strength, the Hall voltage on the probe is 0.547 mV when the current through the probe is 0.141 mA . Later, when...
A Hall probe is calibrated using a magnetic field B that causes protons to have a cyclotron frequency fcyc = 9.7 MHz. At this field strength the Hall voltage is AVH= 0.570 mV when the current through the probe is / = 0.17 mA. The probe is then placed in another magnetic field B and the Hall voltage at the same current is measured to be AVH = 1.750 mV. What is the strength of the unknown magnetic field, B?...
An electromagnetic flowmeter is to be used to measure blood speed. A magnetic field of 0.145 T is applied across an artery of inner diameter 3.80 mm. The Hall voltage is measured to be 89.8 V. What is the average speed of the blood flowing in the artery? cm/s
Inside your smartphone is a small integrated circuit called a "Hall sensor" that measures the magnetic field to fairly high precision. (It is actually made of three separate "Hal bars", to measure the field components in the r, y, and z directions). The Hall sensor acts like a compass for your phone, and assists in navigation and GPS apps. Let's assume each Hall bar is a strip that is 20 11m long, 5 ㎛ wide, and 1 μm thick. (a)...
30. The Hall-effect generator is constructed of a. N material 31. What three factors determine voltage amplitude produced by a Hall generator? a. Size of Hall generator b. Polarity of voltage applied c. Magnetic field strength b. P material (select all) d. Magnitude of current applied by source e. Temperature of Hall generator 32. What are two methods used to increase output signal from a Hall generator? use a diode across device b. use of concentrators (tuning) a. c. increase...
5. (2 marks) A balance can be used to measure the strength of the magnetic field. Consider a loop of wire, carrying a precisely known current, shown in the figure, which is partially immersed (80 % of the total cross sectional area) in the magnetic field. The force that the magnetic field exerts on the loop can be measured with the balance, and this permits the calculation of the strength of the magnetic field. The short side of the loop...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in a circuit (unless it is using a current probe)? 2. Consider Figure 1. According to the calculations in the lab handout, if Z-1kΩ +/6914, then the phase difference (фи-фі) between u(t) and i (t) is 34.6". a. If this v(t) and i(t) were displayed on a DSO (v(t) being a node voltage and using a current probe for i(t) as shown in...
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