hall voltage
Description : If the Earth's magnetic field lines pass through the Hall probe in opposite direction, then the change in reading of voltmeter is A. thrice the Earth's magnetic flux density B. four times the Earth ... C. five times the Earth's magnetic flux density D. twice the Earth's magnetic flux density
Last Answer : twice the Earth's magnetic flux density
Description : Hall probe is made up of A. metals B. non metals C. semiconductor D. radioactive material
Last Answer : semiconductor
Description : A voltmeter arranged across the power supply measures A. potential difference B. e.m.f C. current D. resistance
Last Answer : e.m.f
Description : : Moving a coil in and out of magnetic field induces A. force B. potential difference C. e.m.f D. voltage
Description : Three capacitors with different capacitances are connected in series. Which of the following statements is TRUE? w) All three of the capacitors have the same potential difference between their plates. x ... y) The capacitance of the system depends on the voltage applied across the three capacitors.
Last Answer : ANSWER: X -- THE MAGNITUDE OF THE CHARGE IS THE SAME ON ALL OF THE CAPACITOR PLATES
Description : Consequence of motor effect isA. electromagnetic induction B. current C. voltage D. e.m.f
Last Answer : electromagnetic induction
Description : Sum of e.m.f around any loop equals A. sum of current B. sum of potential difference C. sum of resistances D. sum of charges passing through it per second
Last Answer : sum of potential difference
Description : Current in a circuit depends on A. resistance B. potential difference C. both A and B D. e.m.f
Last Answer : potential difference
Description : Energy transferred per unit charge is A. e.m.f B. current C. potential difference D. conventional current
Description : A straight wire of length 0.20 m moves at a steady speed of 3.0 m s-1 at right angles to the magnetic field of flux density 0.10 T. The e.m.f induced across ends of wire is A. 0.5 V B. 0.06 V C. 0.05 V D. 0.04 V
Last Answer : 0.06 V
Last Answer : Has a lower input impedance, Can measure a.c. signals , Provides a method of inductive coupling
Description : The Hall Effect voltage in intrinsic silicon
Last Answer : The Hall Effect voltage in intrinsic silicon is negative
Description : How can a periodontal pocket be recognised:** A. X-Ray B. Periodontal probe / Calibrated probe C. Periodontal marker D. Bitewing radiograph E. Sharp explorer F. Study cast
Last Answer : B. Periodontal probe / Calibrated probe
Description : Electric field strength related to hall voltage is given by A. VHd B. VH⁄d C. VHE D. Ed
Last Answer : VH⁄d
Description : Hall voltage is directly proportional to A. current B. electric field C. magnetic flux density D. all of above
Last Answer : magnetic flux density
Description : In the circuit shown the voltage drop across the `15Omega` resistor is `30 V` having the polarity as indicated. The ratio of potential difference acro
Last Answer : In the circuit shown the voltage drop across the `15Omega` resistor is `30 V` having the ... difference across `5Omega` and resistance `R` is
Description : Kirchhoff's 2nd law deals with A. current in circuit B. voltage in circuit C. e.m.f in circuit D. both B and C
Last Answer : both B and C
Description : Magnitude of induced e.m.f is proportional to A. rate of change of current B. rate of change of voltage C. rate of change of magnetic flux linkage D. rate of change of resistance
Last Answer : rate of change of magnetic flux linkage
Description : Total number of magnetic field lines passing through an area is called A. magnetic flux density B. magnetic flux C. e.m.f D. voltage
Last Answer : magnetic flux
Description : Current in a circuit if resistance of 15 Ω and potential difference of 3.0 V is applied across it's ends is A. 1 A B. 2 A C. 0.5 A D. 0.20 A
Last Answer : 0.20 A
Description : If the capacitors are connected in parallel, then the potential difference across each capacitor is A. same B. different C. zero D. infinite
Last Answer : same
Description : The potential difference across a 4 ohm resistor is 20 volts. What is the current in the resistor?
Last Answer : ANSWER: 5 AMPS
Description : A constant potential difference is applied across the plates of a parallel-plate capacitor. Neglecting any edge effects, the electric field inside the capacitor is: w) constant x) varying as one over r squared y) decreasing as one moves from the positive to the negative plate z) zero
Last Answer : ANSWER: W -- CONSTANT
Description : The potential difference across a 4 ohm resistor is 20 volts. Assuming that all of the energy dissipated by this resistor is in the form of heat, how many joules of heat are radiated in 10 seconds?
Last Answer : ANSWER: 1000 JOULES
Description : The constant potential difference across a 2 ohm resistor is 20 volts. How many watts of power are dissipated by this resistor?
Last Answer : ANSWER: 200 WATTS
Description : A battery of e.m.f. `10 V` is connected to resistance as shown in figure. The potential difference `V_(A) - V_(B)` between the point `A` and `B` is
Last Answer : A battery of e.m.f. `10 V` is connected to resistance as shown in figure. The potential difference `V_(A) - V_(B) ... -2V` B. 2V C. 5V D. `(20)/(11)V`
Description : What is Hall Difference or Hall Voltage ?
Last Answer : : Applying a magnetic field along the perpendicular to the direction of current in an angle creates a potential difference in the perpendicular direction of both the current and the magnetic field ... the action and the resulting voltage difference is called the voltage difference or is the voltage.
Description : Is it normal that my GP won't do anything but testing across the hall?
Last Answer : You should consider switching to another doctor. This is definitely not standard practice.
Description : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is (A) 11% (B) 9% (C) 1.1% (D) 3%
Last Answer : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is 11%
Description : The minimum essential facility at each type of stations A to F consist of (a) Booking facility (b) Drinking Water (c) Waiting hall/shed (d) All the above*
Last Answer : (d) All the above*
Description : Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f? a. 40 W b. 90W c. 100W d. 120W
Last Answer : b. 90W
Description : What is the effect upon an electron that enters the buncher gap when the potential across the grids is at 0 volts?
Last Answer : There is no effect
Description : Hall effect measurements were made using a sodium conductor. The strength of the Hall field was found to be `E=500xx10^(-6) Vm^(-1)` with a current de
Last Answer : Hall effect measurements were made using a sodium conductor. The strength of the Hall field ... concentration of the conduction electrons in sodium.
Description : Capacitor is fully charged if potential difference is equal toA. e.m.f B. current C. resistance D. power
Description : Three resistors which have different values are connected in series. Which one of the following statements is correct? w) The potential drop across all three resistors is the same. x) The same current passes through all three resistors. y) The same power is dissipated by all three resistors.
Last Answer : ANSWER: X -- THE SAME CURRENT PASSES THROUGH ALL THREE RESISTORS.
Description : What is the difference between a probe a satellite and a rover?
Last Answer : A satellite goes around a planet. A probe goes "somewhere". Arover moves about on the surface of a planet.
Description : Find the mobility of the conduction electrons in a copper conductor if in Hall effect measuremaents performed in the magnetic fileld of induction `B =
Last Answer : Find the mobility of the conduction electrons in a copper conductor if in Hall effect measuremaents ... than that of the longtudinal electric field.
Description : What is hall effect?
Last Answer : If a semiconductor carrying a current ( I ) is placed in a transverse magnetic field ( B ), an electric field ( E ) is induced in the direction perpendicular to both I & B.This is called hall effect.for full explanation visit http://www.ecematerials.com/2013/07/hall-effect.html
Description : In the illustration, the signal from the device connected to terminals 18 and 19 is __________. EL-0046 A. prime mover speed feedback B. loss of control alarm when comparing with the input signal ... slip between the prime mover and the alternator D. to shut down the prime mover if overspeeding
Last Answer : Answer: A
Description : Hall effect is associated with (A) Conductors. (B) Semiconductors. (C) Thermistors. (D) Solders.
Last Answer : (B) Semiconductors.
Description : Hall effect may be used for which of the following? (A) determining whether the semiconductor is p or n type. (B) determining the carrier concentration. (C) calculating the mobility. (D) All the above.
Last Answer : (D) All the above. Ans: D Determining whether the semiconductor is p or n type, determining the carrier concentration, calculating the mobility
Description : Explain in brief ‘Hall effect sensor’.
Last Answer : Working: * Working principle of a Hall effect sensor is that if strip of conducting material carries a current in presence of transverse magnetic field as shown fig . * The difference of ... with Hall strip. * When a transverse magnetic field passes through the strip, the voltage difference
Description : (i) Explain the process of diffusion in semiconductor material. (ii) Explain Hall effect.
Last Answer : (i) Diffusion: In a semi conductor bar a concentration gradient exist when either number of electrons or holes is greater in one region of a semi conductor as compared to other region. When ... to determine whether a semiconductor is N type or P type, and to find carrier concentration
Description : Explain how AC current is measured using hall effect transducer.
Last Answer : This type of sensor works on a simple electromagnetic principle. In above diagram of the Hall effect. A current is conducted through a thin piece of foil from terminal I and ground. ... called the Hall-effect voltage is produced at the terminals attached to the opposite sides of the foil.
Description : Explain in brief AC Current , RMS Indication using Hall Effect Transducer.
Last Answer : When an ac current passes through the conductor it sets up a magnetic field around the conductor. This magnetic field is proportional to the current. A Hall Effect Transducer is placed in a ... flowing in the conductor. In this way, the current is measured using the Hall effect transducer.
Description : State Hall effect. Explain in brief operation of hall effect transducer with its suitable applications.
Last Answer : Principle: The principle of working of a Hall Effect Transducer is that if a strip of conducting material carries' a current in the presence of a transverse magnetic field, a difference of ... a transverse magnetic field passes through the strip, an output voltage appears across the output leads.
Description : The following property of semiconductors cannot be determined from Hall effect: (1) Semiconductor is n–type or p–type (2) The carrier concentration (3) The mobility of semiconductor (4) The atomic concentration of semiconductor
Last Answer : The following property of semiconductors cannot be determined from Hall effect: The atomic concentration of semiconductor
Description : A Hall Effect sensor A) exists only in theory B) is a non-contacting magnetic sensor C) can operate only a few times before failure D) produces very large voltages
Last Answer : A hall effect sensor is a non-contacting magnetic sensor
Description : What are the applications of Hall effect?
Last Answer : Hall effect transducer find application 8n instruments that measure magnetic field with small flux densities.
Description : When troubleshooting most electronic circuits, 'loading effect' can be minimized by using a voltmeter with a/an ___________________. A. input impedance much greater than the impedance across which the voltage ... sensitivity of less than 1000 ohms/volt D. sensitivity of more than 1000 volts/ohm