Question

The Hall Voltage is the potential created across a current-carrying metal-strip when the strip is placed...

The Hall Voltage is the potential created across a current-carrying metal-strip when the strip is placed in a magnetic field perpendicular to the current flow in the strip. It is used as a research tool to probe the movement of charges in materials, as well as determining the blood flow rate. One fundamental use of the Hall effect is the determination of the charge of the charge carriers. What of the following statements is true concerning the strips with a positive versus a negative Hall voltage?

  • (Choice A) The top strip has positive charge carriers, and the electric field points in the same direction as the electric force.

  • (Choice B) The bottom strip has positive charge carriers, and the electric field and electric force point in the same direction.

  • (Choice C) The top strip has negative charge carriers, which get deflected to the top of the plate.

  • (Choice D) The bottom strip has negative charge carriers, and the magnetic force points upward along the plate.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

In case of positive hall voltage, the charge carriers have positive charge i.e. they are holes. When the magnetic field is applied perpendicular to the current then there exists the magnetic force on the positive charges which puah them upward. Hence upper plate is positively charged and lower plate is negatively charged. Then thwre is equllibrium between magnetic force and electrostatic force such that specific value of hall voltage is produced. Also for positive charges electric field and electric force have same direction. Hence the answer is

choice A and choice D

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a...
A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0880 T, it produces a Hall voltage of 0.680 µV. (a) When it is used to measure an unknown magnetic field, the Hall voltage is 0.380 µV. What is the magnitude of the unknown field? mT (b) The thickness of the probe in the direction of B is 1.60 mm. Find the density of the charge carriers, each of...
A metal strip 2.50 cm wide and 1.80 cm thick carries a current of 29.5 A...
A metal strip 2.50 cm wide and 1.80 cm thick carries a current of 29.5 A in a region containing a perpendicular uniform magnetic field of strength 1.51 T. The Hall voltage across the 2.50 cm width of the strip is measured to be 4.03 ?V. The drift speed of the electrons in the strip is 1.07×10-4 m/s. Find the number density of the charge carriers in the strip (in m-3).
A metal strip 2.50 cm wide and 1.80 cm thick carries a current of 27.1 A...
A metal strip 2.50 cm wide and 1.80 cm thick carries a current of 27.1 A in a region containing a perpendicular uniform magnetic field of strength 1.67 T. The Hall voltage across the 2.50 cm width of the strip is measured to be 4.98 μV. Calculate the drift speed of the electrons in the strip. 1.19×10-4 m/s Find the number density of the charge carriers in the strip (in m-3).
Indicate true or false in each of the following statements: True False  A horizontal wire containing a...
Indicate true or false in each of the following statements: True False  A horizontal wire containing a current toward the east will have a negative Hall potential from the bottom to the top of the wire. True False  Two antiparallel currents attract each other. True False  A + charge initially moving east through the earths magnetic field along the equator will fall faster than if it is moving west. True False  The direction of the magnetic field in a current carrying coil is parallel...
Consider two infinite plates, both parallel to the xy plane of a coordinate system. The top...
Consider two infinite plates, both parallel to the xy plane of a coordinate system. The top plate is at the height z = +5cm and carries a uniform charge distribution of ?= +3nC/m2. The bottom plate is at height z = - 5cm and carries a uniform charge distribution of ?= -3nC/m2. The space between the plates is filled with air. Between the plates runs a long wire along the y-axis (at z=0 and x=0), carrying a current of 10A....
The direction of the magnetic force on an electron moving through a magnetic field is the...
The direction of the magnetic force on an electron moving through a magnetic field is the same as the direction of the vector formed by taking the cross product of the velocity with the magnetic field (v x B).            True/ False The magnetic field is also referred to as the magnetic flux _____________ [one word]. Consider a particle moving through a magnetic field. If the magnetic field doubles and the velocity of the particle halves, the magnetic force will:...
A) Three charged objects are placed in order A B C along a straight line. If...
A) Three charged objects are placed in order A B C along a straight line. If A is negative and the net electric force on B is zero, what is true about the charge of C? -Must be positive -Must be negative -Could be negative or positive B) When a proton is released in an electric field it -does not move. -moves perpendicular to the direction of field line -moves in the direction of field line -moves in the opposite...
1.When a charge q is placed at a certain point in an electric field, it experiences...
1.When a charge q is placed at a certain point in an electric field, it experiences a force toward the west of magnitude F. If instead a change 2q were placed at that same point what force would it experience? A.a force toward the east, of magnitude F/2 B.a force toward the east, of magnitude F C.a force toward the east, of magnitude 2F D.a force toward the west, of magnitude F/2 E.a force toward the west, of magnitude F...
A proton is accelerated through a potential difference of 10 kV and enters a uniform magnetic...
A proton is accelerated through a potential difference of 10 kV and enters a uniform magnetic field at right angles. Calculate the value of the magnetic flux density necessary to move the proton in a circular path of radius 10 mm. [6] A piece of wire of cross-sectional area A and resistivity ρ is bent into a circular loop of radius r and placed in a magnetic field with its plane at right angles to the field. Determine the magnitude...
A circular loop of wire in the xy plane has a current flow clockwise through it...
A circular loop of wire in the xy plane has a current flow clockwise through it as viewed from the +z direction. There is a uniform external magnetic field applied to the loop in the +x direction. What is the direction of the net force of the magnetic field on the loop? a) +y b) -y c) -z d) There is no net force on the loop. Magnetic fields a) Can have a net flux out of a closed surface....
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT