[link] shows a long straight wire just touching a loop carrying a current
. Both lie in the same plane. (a) What direction must the current
in the straight wire have to create a field at the center of the loop in the direction opposite to that created by the loop? (b) What is the ratio of
that gives zero field strength at the center of the loop? (c) What is the direction of the field directly above the loop under this circumstance?
Find the magnitude and direction of the magnetic field at the point equidistant from the wires in
[link] (a), using the rules of vector addition to sum the contributions from each wire.
,
Find the magnitude and direction of the magnetic field at the point equidistant from the wires in
[link] (b), using the rules of vector addition to sum the contributions from each wire.
What current is needed in the top wire in
[link] (a) to produce a field of zero at the point equidistant from the wires, if the currents in the bottom two wires are both 10.0 A into the page?
10.0 A
Calculate the size of the magnetic field 20 m below a high voltage power line. The line carries 450 MW at a voltage of 300,000 V.
Integrated Concepts
(a) A pendulum is set up so that its bob (a thin copper disk) swings between the poles of a permanent magnet as shown in
[link] . What is the magnitude and direction of the magnetic force on the bob at the lowest point in its path, if it has a positive
charge and is released from a height of 30.0 cm above its lowest point? The magnetic field strength is 1.50 T. (b) What is the acceleration of the bob at the bottom of its swing if its mass is 30.0 grams and it is hung from a flexible string? Be certain to include a free-body diagram as part of your analysis.
(a)
upward
(b)
Integrated Concepts
(a) What voltage will accelerate electrons to a speed of
? (b) Find the radius of curvature of the path of a
proton accelerated through this potential in a 0.500-T field and compare this with the radius of curvature of an electron accelerated through the same potential.
Integrated Concepts
Find the radius of curvature of the path of a 25.0-MeV proton moving perpendicularly to the 1.20-T field of a cyclotron.
60.2 cm
Integrated Concepts
To construct a nonmechanical water meter, a 0.500-T magnetic field is placed across the supply water pipe to a home and the Hall voltage is recorded. (a) Find the flow rate in liters per second through a 3.00-cm-diameter pipe if the Hall voltage is 60.0 mV. (b) What would the Hall voltage be for the same flow rate through a 10.0-cm-diameter pipe with the same field applied?
Integrated Concepts
(a) Using the values given for an MHD drive in
[link] , and assuming the force is uniformly applied to the fluid, calculate the pressure created in
(b) Is this a significant fraction of an atmosphere?
(a)
(b) Not a significant fraction of an atmosphere
Integrated Concepts
(a) Calculate the maximum torque on a 50-turn, 1.50 cm radius circular current loop carrying
in a 0.500-T field. (b) If this coil is to be used in a galvanometer that reads
full scale, what force constant spring must be used, if it is attached 1.00 cm from the axis of rotation and is stretched by the
arc moved?
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life