A silver plate of thickness 10 microns and a germanium plate of thickness 1 mm are used in a magnetic field of 0.1 T as a Hall probe. The silver plate is measured with a probe current of 10 A, a Hall voltage of 9 V, the germanium plate with a probe current of 10 mA, a Hall voltage of 14 mV. Determine the ratio of the carrier densities of silver and germanium.

A silver plate of thickness 10 microns and a germanium plate of thickness 1 mm are...
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 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?
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 thin film of aluminum has length 1 cm, width 1 mm and thickness 1000 angstroms. A 50 mA current is flowing along the length of this film. What will be the Hall voltage developed across the width of this sample when a magnetic field of 1 tesla is applied perpendicular to the plane of the film? The carrier concentration in aluminum is 2 x 10"/cm'. Please give your answer in SI units.
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 operates with a 120-mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0820 T, it produces a Hall voltage of 0.720 V. (a) When it is used to measure an unknown magnetic field, the Hall voltage is 0.320 WV. What is the magnitude of the unknown field? x Your response differs from the correct answer by more than 10%. Double check your calculations. mt (b) The thickness of the probe in the...
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 ,...
1) A quartz piezoelectric crystal having a thickness of 2 mm and a voltage sensitivity of 0.055 V · m/N is subjected to a pressure of 200 psi. Calculate the voltage output. 2) A Hall-effect transducer is used for the measurement of a magnetic field of 5000 G. A 2-mm slab of bismuth is used with a current of 3 A. Calculate the voltage output of the device. 3)In a Michelson interferometer, 100 fringes cross the field of view when...
Problem 4 [5 marks] B O B O Consider a current-carrying conductor shown above under the influence of a constant magnetic field B. At steady state, the electric force Fe due to the Hall electric field Encounteracts the magnetic force Fmexactly (above right). At this point a. [1 mark]Fel - and therefore E b. [1 mark] The conductor is a copper strip with conductivity of 5.76 x 107S/m. The current in the conductor is 1 mA. The cross section of...
I need both.
5. A Hall effect sensor 10mm long, 10 microns wide and one micron thick is made of silicon with an electron concentration of 5 * 1012 per cubic centimeter. What is the Hall voltage when exposed to a 0.17 magnetic field and fed a current of 10 microamps. 6. Two thin, straight parallel wires suspended 10 mm apart are carrying one amp of current in opposite directions. Find the magnitude and direction of the forces between them.